Last updated: January 18, 2025
East Java, Indonesia, exhibits a diverse climate characterized primarily by the Köppen-Geiger classifications of Aw (tropical savanna) and Am (tropical monsoon). This region experiences a minimum temperature of 11°C (52°F) during September, indicative of the cooler dry phase, while the average temperature stabilizes around 26°C (79°F) throughout the year. The climate can reach temperatures peaking at 39°C (103°F) in November, showcasing the extreme heat of the wet season. This unique climatic interplay significantly influences the region's ecosystems, agriculture, and daily life.
In East Java, Indonesia, temperature patterns reveal distinct seasonal trends throughout the year. During the wet season, from January to March, temperatures remain relatively stable, with minimums around 16°C to 18°C, average temperatures consistently at 26°C, and maximums peaking at approximately 35°C. As the dry season approaches in April and May, a subtle drop in minimum temperatures occurs, with May recording the year’s lowest at 14°C, while average temperatures rise slightly to around 27°C. The peak of the dry season in June and July brings the coolest nightly temperatures, with lows of 12°C to 14°C, yet days can heat up to 36°C. The transitioning months of August and September see a gradual rise in temperatures again, with September marking the annual minimum average of 11°C amid maximums climbing to 37°C. October and November experience a further escalation in heat, culminating in maximum temperatures reaching 39°C. By December, temperatures stabilize somewhat, ensuring a warm end to the year, underscoring the region's tropical climate variability with alternating wet and dry influences.
Bokor experiences a minimum temperature of 12°C (54°F) in July, rising to a maximum of 33°C (91°F) in November, as detailed in monthly temperatures in Bokor. Similarly, Malang shares the same minimum temperature of 12°C (54°F) in July and matches Bokor's November peak of 33°C (91°F), according to monthly temperatures in Malang. In contrast, Bandung starts warmer, with a minimum of 19°C (66°F) in August and reaches a higher maximum of 34°C (93°F) in December, as shown in monthly temperatures in Bandung.
East Java, Indonesia, experiences a pronounced monsoon season characterized by heavy rainfall from January to March. During this period, monthly precipitation peaks, with February recording a significant 340 mm (13.4 in), while January and March follow closely with 310 mm (12.2 in) and 314 mm (12.4 in), respectively. These months also see a high number of rainy days, with February experiencing up to 27 days of precipitation. As the wet season transitions to drier months in April and May, the rainfall diminishes sharply, dropping to 190 mm (7.5 in) and further to 78 mm (3.1 in), respectively, indicating a significant reduction in both intensity and frequency of rain.
The dry season in East Java, spanning from June to August, is marked by minimal precipitation, with July and August receiving only 26 mm (1.0 in) and 23 mm (0.9 in), respectively, and an average of just 6 rainy days per month. Following this dry spell, September sees a slight uptick in rainfall to 42 mm (1.7 in), leading into October’s increase to 87 mm (3.4 in). November once again experiences a surge in precipitation with 278 mm (11.0 in) as the monsoon season returns, concluding the year with another significant rainfall total of 322 mm (12.7 in) in December. This seasonal variability influences agriculture, water availability, and the overall ecosystem of the region.
In East Java, Indonesia, sunshine duration exhibits a clear seasonal pattern, with hours gradually increasing from the start of the year onwards. January begins with 217 hours of sunshine, but this figure climbs steadily through the months. By the end of March, sunshine hours reach 290 hours, heralding the transition into the drier season. April and May see even more sunlight, with May recording 304 hours, setting the stage for the peak sunshine months of July and August. During these months, average sunshine hours soar to 312 hours and 316 hours, respectively, providing ample daylight that greatly benefits agriculture and outdoor activities.
As the year progresses toward the end of the rainy season, sunshine duration begins to taper off slightly, though it remains robust compared to the earlier months. October and November offer substantial sunlight, with 310 hours and 271 hours, respectively, before December sources 276 hours. Although the total sunshine hours decline as the wet season approaches, the amounts remain significant, ensuring that East Java experiences a healthy balance of daylight even in its transitional months. Overall, this seasonal dynamism in sunshine availability reflects the region's tropical climate, underscoring the importance of sunlight in shaping East Java's agricultural cycles and ecological richness.
The UV Index in East Java, Indonesia, remains notably high throughout the year, indicative of its tropical climate and proximity to the equator. From January to April, the UV Index soars to extreme levels, with values consistently reaching 15 or 16 during these months. This intensity necessitates careful sun protection measures as the burn time is a mere 10 minutes under these conditions. Such extreme UV levels underscore the importance of incorporating sun safety practices, especially during the first quarter of the year when the sun's rays are most potent, emphasizing the potential health risks associated with prolonged exposure.
As the year progresses toward the mid-year months, the UV Index still maintains high values, exhibiting slight fluctuations but remaining within the extreme category. Notably, in May, the Index dips to 13, followed by 11 in June, with subsequent readings of 12 in July and 14 in August. However, it escalates once more to 15 in September and returns to 16 in October. This sustained high UV exposure reaffirms the necessity for individuals in East Java to prioritize sun protection year-round, reinforcing that even during drier months, the potential for skin damage remains significant due to the persistent extreme UV conditions.
UV Risk Categories
In East Java, Indonesia, daylight duration exhibits a remarkable consistency throughout the year, predominantly featuring around 12 hours of daylight from January to March. This uniformity is characteristic of tropical regions, where the length of day remains relatively stable due to the proximity to the equator. As the year transitions into April, daylight decreases slightly to 11 hours and maintains this duration through July and August, traditionally coinciding with the drier months of the year. This notable shift underscores the influence of seasonal changes on daylight exposure, even within the context of such a tropical climate.
As September approaches, daylight duration returns to 12 hours, persisting through October and November before concluding the year with 12 hours once more in December. This cyclical pattern illustrates the region's minimal variation in daylight hours, which contributes to a predictable rhythm for agriculture, tourism, and daily life. The relatively stable daylight duration across the seasons allows for an assurance of consistent sunlight, supporting the vibrant ecosystems and agricultural practices that characterize East Java's lush landscape.
Bandung, Indonesia, experiences a tropical climate characterized by warm temperatures and significant rainfall. Monthly average temperatures range from 24°C (76°F) in July and August to around 27°C (81°F) during the remaining months, with maximums reaching up to 34°C (93°F) in February and December. The city sees heavy rainfall, especially from November to February, with January and February receiving over 290 mm (11.4 in) of precipitation each. Sunshine hours peak around May to July, averaging over 300 hours per month, contrasting with the cloudier and wetter months at the start and end of the year. For more detailed information, visit Bandung climate.
Banyuwangi, Indonesia, features a tropical climate characterized by relatively stable temperatures throughout the year, with averages around 25°C (77°F) and variations from 16°C (62°F) in cooler months to highs of 33°C (93°F) in December. The region experiences a distinct wet season from December to February, with January receiving the highest precipitation at 418 mm (16.5 in). Sunny days are abundant, especially from May to August, where sunshine hours peak at over 300 hours monthly. For more detailed information on the area's climate, check out Banyuwangi climate.
The climate in Barisan, Indonesia is characterized by a tropical pattern, with temperatures typically ranging from a minimum of 17°C (62°F) in July to a maximum of 33°C (91°F) in February and December. The region experiences significant rainfall, peaking in January and February with over 300 mm (11.8 in) of precipitation, while July is the driest month with only 20 mm (0.8 in). Sunshine hours are abundant, particularly in mid-year, with July and August averaging around 311 to 314 hours of sunlight. Despite the heavy rainfall during certain months, the climate remains generally warm and humid throughout the year. For more information, visit Barisan climate.
Batu, Indonesia experiences a tropical climate characterized by warm temperatures year-round and significant rainfall, particularly from January to February, with precipitation peaking at 564 mm in February. Average temperatures range from a mild 19°C (66°F) in January to a maximum of 33°C (92°F) in November. From June to August, the city enjoys drier conditions, with only 27 mm of rain in August, accompanied by ample sunshine hours, peaking at 312 hours. Visitors can expect pleasant weather during the dry season, making it an ideal time for outdoor activities. For more detailed climate information, visit Batu climate.
Bira, Indonesia experiences a tropical climate with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 31°C (88°F) throughout the year. The region is characterized by significant rainfall, particularly in January (306 mm) and February (316 mm), while July and August are notably drier, receiving just 14 mm and 4 mm respectively. Sunshine hours vary, peaking in August with 322 hours. For more detailed information about the climate, visit Bira climate.
Bokor, Indonesia, experiences a tropical climate characterized by mild temperatures and significant rainfall throughout the year. Average temperatures range from a comfortable 20°C (68°F) in July to a warm 23°C (73°F) in November, with maximum temperatures peaking at 33°C (91°F) in November. The region sees its highest precipitation in February and March, with rainfall exceeding 400 mm (15.7 in) during these months, while the driest months are July and August with only about 30 mm (1.2 in) of rain. Sunshine is abundant, particularly during the dry season, peaking at 313 hours in August. For a more detailed overview, visit Bokor climate.
Candi, Indonesia, experiences a tropical climate characterized by warm temperatures year-round. Monthly average temperatures range from 27°C (81°F) in January to 29°C (84°F) in October, peaking at a maximum of 34°C (93°F) in November and December. The region sees significant rainfall, particularly from January to February and in December, with precipitation peaking at 295 mm (11.6 in) in December. Despite the rain, sunshine is abundant, especially from June to August, with July averaging 316 hours of sunlight. For more details, visit Candi climate.
Cangkringan, Indonesia experiences a tropical climate characterized by warm temperatures throughout the year, with average monthly temperatures ranging from 24°C (76°F) to 27°C (80°F). The region sees significant rainfall, especially during the wet season from December to March, with January and February recording the highest precipitation levels of 316 mm and 370 mm, respectively. Sunshine hours vary, peaking in July and August with over 311 hours of sunlight, providing ample clear days in the midst of the wet season. Visitors can expect a mix of humid conditions and vibrant greenery due to the abundant rainfall. For more detailed climate information, check Cangkringan climate.
Galis Dua, Indonesia experiences a tropical climate characterized by warm temperatures and significant rainfall. Monthly temperatures fluctuate between a minimum of 24°C (76°F) and a maximum of 34°C (93°F), with average temperatures generally around 28°C (82°F). The wettest months are January and February, receiving up to 279 mm (11.0 in) of precipitation, while the driest month is August with just 5 mm (0.2 in). Sunshine hours are abundant, peaking in July and August with over 300 hours. For more detailed information, visit Galis Dua climate.
Gunong, Indonesia experiences a tropical climate with consistently warm temperatures throughout the year. Average temperatures range from 27°C (81°F) in the cooler months to 29°C (84°F) in October. Rainfall peaks between January and March, receiving up to 279 mm (11.0 in) of precipitation, while July and August are notably drier with only 5 mm (0.2 in) and 14 mm (0.5 in) respectively. Sunshine hours are abundant, especially in mid-year, with July and August averaging around 316 hours. For detailed climate information, visit Gunong climate.
The climate in Gunung, Indonesia features consistently warm temperatures throughout the year, with average highs ranging between 27°C (81°F) and 31°C (88°F). January and February receive the most rainfall, peaking at 316 mm (12.4 in), while July and August are notably dry, receiving only 14 mm (0.6 in) and 4 mm (0.2 in) respectively. The area enjoys abundant sunshine, particularly in the height of the dry season, with July and August averaging over 316 hours of sunshine. For more detailed information, visit Gunung climate.
The climate in Jepon, Indonesia is characterized by a tropical nature, with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 34°C (93°F) throughout the year. The wettest months are typically from January to February and November to December, with precipitation peaking in January at 275 mm (10.8 in) and December at 295 mm (11.6 in). Sunshine hours are plentiful, especially during the dry season, with July and August recording up to 316 hours of sunshine. This creates a warm and humid environment ideal for tropical vegetation. For more details, visit Jepon climate.
Jepun, Indonesia experiences a tropical climate with distinct patterns in temperature, precipitation, and sunshine throughout the year. The temperatures range from a minimum of 17°C (62°F) in July and August to a maximum of 36°C (98°F) in December, maintaining an average around 26–27°C (79–80°F). Rainfall peaks in February with 370 mm (14.6 in), while the driest months are July and August, receiving only about 13 mm (0.5 in) and 14 mm (0.6 in) respectively. This region enjoys abundant sunshine, especially from May to August, where sunshine hours exceed 300. For more detailed information, visit Jepun climate.
Karangasem, Indonesia, experiences a tropical climate characterized by warm temperatures throughout the year. Average temperatures range from 27°C (81°F) in the cooler months to 28°C (82°F) during the warmer months, with maximums reaching up to 31°C (88°F). The region sees significant rainfall, particularly from January (282 mm) to March (250 mm), with a marked decrease in precipitation from June (78 mm) to August (13 mm). Daily sunshine is abundant, particularly in the peak dry months of July and August, offering over 315 hours of sunshine. For more detailed information, visit Karangasem climate.
Malang, Indonesia, experiences a tropical climate characterized by a consistent temperature range throughout the year, with monthly averages between 20°C and 23°C (68°F to 73°F). The warmest months are November and December, while the coolest period is from July to September. Rainfall peaks from January to March, with January receiving the highest precipitation at 341 mm (13.4 in), and significantly decreases in the dry months of June and August. Sunshine is abundant, with July and August boasting over 300 hours of sun. For more detailed information, visit Malang climate.
The climate in Mesjid, Indonesia, is characterized by warm temperatures year-round, with averages ranging from 27°C (81°F) to 28°C (83°F). The hottest months are typically April and December, where maximum temperatures can reach up to 30°C (86°F). Rainfall is abundant, particularly in January (353 mm) and December (333 mm), while the driest months, such as August, see minimal precipitation (10 mm). The region enjoys considerable sunshine, with peak hours in August (314 hours) and October (316 hours). For more detailed information, visit Mesjid climate.
Pacitan, Indonesia experiences a tropical climate characterized by warm temperatures and significant rainfall. Average temperatures range from 24°C (76°F) to 27°C (81°F) throughout the year, with the hottest months being January and February. The wet season peaks in January and November, with precipitation reaching up to 309 mm (12.2 in) and 334 mm (13.1 in) respectively. Despite the heavy rains, the region enjoys ample sunshine, particularly in the dry months from May to October, when residents can expect up to 317 hours of sunlight. For more detailed information, visit Pacitan climate.
The climate in Penanggungan, Indonesia, is characterized by warm temperatures and significant rainfall throughout the year. Average temperatures range from a minimum of 11°C (52°F) in September to a maximum of 32°C (89°F) in November, with consistent averages around 22-23°C (73°F). The region experiences heavy precipitation, especially in January and February, with rainfall peaking at 417 mm (16.4 in) in February. Despite the rain, sunshine hours are plentiful, with July and August offering over 300 hours each month, making it relatively dry compared to other months. For more detailed information, visit Penanggungan climate.
The climate in Plaosan, Indonesia, showcases a tropical pattern, with temperatures ranging from a minimum of 12°C (55°F) in July to a maximum of 31°C (88°F) in October and December. Rainfall is heaviest from January to March, with January recording 448 mm (17.6 in) of precipitation. Dry months, particularly from June to August, see significantly less rain, with July receiving only 22 mm (0.9 in). Sunshine hours peak during these dry months, with July and August offering over 310 hours of sunlight. For more details, visit Plaosan climate.
The climate in Plataran, Indonesia, is characterized by warm temperatures year-round, averaging around 25°C (77°F). Monthly maximum temperatures range from 29°C (85°F) to 33°C (93°F), while minimum temperatures generally stay between 16°C (62°F) and 21°C (70°F). The region experiences significant rainfall, particularly from January to February and in November, with January recording the highest precipitation at 418 mm (16.5 in). Sunshine hours are abundant, peaking in July and August with about 305 to 312 hours, making it a bright destination despite its rainy season. For more detailed information, visit Plataran climate.
Prambatan, Indonesia, experiences a tropical climate characterized by warm temperatures throughout the year. Average monthly temperatures range from 27°C (81°F) to 28°C (83°F), with highs reaching up to 36°C (97°F) in December. The region sees significant rainfall, peaking in February with 343 mm (13.5 in) and experiencing the driest months from July to August, which receive only 12 mm (0.5 in) and 16 mm (0.6 in) respectively. Sunshine is abundant, especially in the dry season, with July and August having over 315 hours of sun. For more information, visit Prambatan climate.
The climate in Raas, Indonesia, features warm temperatures year-round, with averages ranging from 27°C (81°F) in the cooler months to 28-29°C (82-85°F) during the warmer months. January and December receive the highest rainfall at approximately 360 mm (14.2 in) and 376 mm (14.8 in), respectively, while August is notably dry with just 23 mm (0.9 in) of precipitation. Raas enjoys abundant sunshine, peaking in August with around 317 hours, contributing to its tropical charm. For more detailed information, visit Raas climate.
Surabaya, Indonesia, experiences a tropical climate characterized by high temperatures and seasonal rainfall. Average monthly temperatures range from 28°C (82°F) in January and February to 30°C (86°F) in October. The wettest months are March and December, with precipitation peaking at 320 mm (12.6 in) in March. Despite heavy rainfall, Surabaya enjoys abundant sunshine, particularly in the dry season from July to September, with sunshine hours reaching up to 311 in July. For more detailed information, visit Surabaya climate.
Tamansari, Indonesia experiences a tropical climate characterized by warm temperatures and significant rainfall throughout the year. Average monthly temperatures range from 22°C (73°F) to 25°C (77°F), with maximums hitting 33°C (92°F) in December. The region sees its heaviest rainfall during January (316 mm) and February (334 mm), while the driest months are July and August, with only 35 mm and 33 mm of precipitation, respectively. Sunshine is abundant, particularly from June to August, with over 300 hours of sunlight per month. For more detailed information, visit Tamansari climate.
The climate in Tengger, Indonesia, is characterized by warm temperatures year-round, with monthly averages typically ranging from 27°C (81°F) to 28°C (83°F). Rainfall is most pronounced from January to March, peaking in February with 320 mm (12.6 in), while the driest months are July and August, receiving only 24 mm (1.0 in) and 13 mm (0.5 in) respectively. Sunshine hours are abundant, especially during the dry season, with over 300 hours of sunshine from May to August. This combination of warmth and rainfall creates a lush environment, making it an appealing destination. For more details, visit the Tengger climate.
The climate in Trogan Barat, Indonesia, is characterized by consistently warm temperatures throughout the year, with averages typically ranging from 27°C (81°F) in January to 29°C (84°F) in May. Rainfall is most abundant during the early months, peaking in February with 309 mm (12.2 in), while July and August see significantly less precipitation, with only 17 mm (0.7 in) and 10 mm (0.4 in), respectively. Sunshine hours are plentiful, especially in July and August, averaging around 314 and 318 hours, respectively. This tropical climate supports a lush environment, making Trogan Barat a unique destination. For more details, visit Trogan Barat climate.
Tumpakjoho, Indonesia experiences a tropical climate characterized by warm temperatures and distinct wet and dry seasons. Average temperatures range from 25°C (77°F) in cooler months to around 27-28°C (81-82°F) in warmer months. The wettest months are December and February, with high precipitation levels of 286 mm (11.3 in) and 284 mm (11.2 in) respectively. Sunshine is abundant, peaking in August with 314 hours of sunlight. For more detailed information, visit Tumpakjoho climate.
Tumpakoyot, Indonesia experiences a warm and humid climate characterized by consistent temperatures throughout the year, with averages around 27°C (81°F). The rainy season peaks from January to March and November, bringing significant precipitation, especially in November with 337 mm (13.3 in). In contrast, the driest months are July and August, which see remarkably low rainfall. Despite the rain, Tumpakoyot enjoys ample sunshine, reaching up to 314 hours in August. For more detailed climate insights, visit Tumpakoyot climate.
Wangi, Indonesia experiences a tropical climate characterized by warm temperatures and significant rainfall. The average monthly temperatures range from a minimum of 22°C (72°F) in August to a maximum of 33°C (91°F) in October and December. Rainfall is most abundant from January to February, peaking at 320 mm (12.6 in) in February, while the driest months are July and August with only 24 mm (1.0 in) and 13 mm (0.5 in) respectively. Sunshine is plentiful throughout the year, reaching up to 317 hours in August. For more detailed information, visit Wangi climate.
In conclusion, East Java, Indonesia, presents a fascinating interplay of climate and environmental factors that shape its unique landscape and lifestyle. The region's tropical savanna and monsoon climates lead to significant variations in temperature, precipitation, and sunlight throughout the year. With extreme UV Index levels and consistently high sunshine duration, particularly in the drier months, awareness of sun safety and environmental changes is crucial for residents and visitors alike. The steady daylight duration ensures a reliable cycle for agriculture and daily activities, reinforcing the region's thriving ecosystems and rich cultural heritage. Overall, understanding these climatic patterns is essential for sustainable development and promotes appreciation for East Java's diverse natural phenomena.