Last updated: January 18, 2025
Chittagong, Bangladesh, exhibits a multifaceted tropical climate characterized by two primary Köppen-Geiger classifications: Am (Tropical Monsoon) and Aw (Tropical Savanna). The city experiences a significant temperature range, with a minimum of 8°C (46°F) recorded in February, escalating to an impressive maximum of 41°C (106°F) in April. Averaging around 26°C (79°F), the climate supports a vibrant ecosystem while presenting unique challenges related to seasonal weather patterns, humidity, and rainfall. This climatic diversity plays a crucial role in shaping the local environment and the livelihoods of its inhabitants.
Chittagong, Bangladesh, showcases distinctive seasonal temperature patterns throughout the year, beginning with cooler winter months in January and February, where minimum temperatures dip to around 8°C (46°F). As the region transitions into spring, temperatures rise significantly, peaking in April with maximums reaching 41°C (106°F). May maintains this heat, with slightly elevated minimums of 20°C (68°F), before a gradual shift to cooler conditions. The monsoon season from June to September sees temperatures stabilize around 28°C (83°F), accompanied by high humidity and rain, while maximums remain relatively consistent at 37°C (99°F). Finally, the year wraps up with a cooling trend in October and November, as temperatures moderate, culminating in December with pleasant averages of 21°C (69°F), revealing the region's dynamic climate and its characteristically warm tropical nature.
In Chattogram, temperatures range from a minimum of 15°C (59°F) in February to a maximum of 33°C (92°F) in May, making it a warm destination during this period. Meanwhile, Cox's Bazar experiences slightly lower winter temperatures, with a minimum of 14°C (57°F) in February and peaks at 36°C (97°F) in May. In contrast, Bandarban offers even cooler winter months, dipping to 9°C (48°F) in February, but can reach an impressive maximum of 41°C (106°F) in April. For detailed monthly temperatures, visit monthly temperatures in Chattogram, monthly temperatures in Cox's Bazar, and monthly temperatures in Bandarban.
Chittagong, Bangladesh, experiences a pronounced precipitation pattern throughout the year, with notable variations between the dry and wet seasons. The year begins with minimal rainfall in January and February, recording merely 7 mm (0.3 in) and 5 mm (0.2 in) respectively, indicating a largely dry climate. As March arrives, precipitation begins to rise, culminating in 35 mm (1.4 in), and marking the onset of the pre-monsoon season. April sees a significant increase to 108 mm (4.3 in), while May further intensifies with 169 mm (6.6 in), paving the way for the heavy monsoon rains.
The monsoon season from June to September is marked by substantial rainfall, peaking in July with a staggering 505 mm (19.9 in), contributing to Chittagong’s reputation as one of the wettest regions in Bangladesh. During these months, rain falls on nearly every day, with June and July averaging around 27 to 29 days of precipitation. Following the peak monsoon months, rainfall begins to diminish in October (212 mm) and November (39 mm), while December closes the year with a modest 31 mm (1.2 in), encapsulating Chittagong's dynamic and diverse precipitation regime.
Chittagong, Bangladesh, experiences a distinct seasonal variation in sunshine duration, with a notable increase from winter through summer. The year commences with January's modest 243 hours of sunshine, gradually inching upward in February to 287 hours. This trend accelerates in March, reaching 328 hours as residents anticipate the approaching warmth. April and May mark the peak sunshine months, with each month providing an impressive 325 to 336 hours, fostering vibrant outdoor activity and supporting the region's lush vegetation.
However, as the monsoon season unfolds in June, sunlight availability dips significantly to 261 hours, followed by July's further decline to 259 hours. Despite these reductions, the transition into late summer sees a slight recovery, with August and September offering 274 and 273 hours, respectively. By October and November, sunshine duration bounces back to 290 and 291 hours, reclaiming luminous days before the year concludes in December with 286 hours. This cyclical pattern highlights how Chittagong's climate, influenced by seasonal changes, affects both the duration of sunlight and the local ecosystem.
Chittagong, Bangladesh, experiences significant fluctuations in the UV Index throughout the year, reflecting the region's tropical climate and varying sun exposure. In the early months, January sees a UV Index of 7, categorized as high, allowing for 25 minutes of safe sun exposure before risk of harm. As February approaches, the UV levels rise to 9, deemed very high, significantly shortening the safe exposure time to just 15 minutes. The peak UV levels are recorded in March to June, where the UV Index soars to 12-14, classified as extreme, necessitating caution with a recommended burn time of 10 minutes.
The summer months maintain these extreme levels, particularly in July and August, both recording a UV Index of 14. This intensity gradually decreases in September and October, with UV readings slightly lowering to 13 and 11, respectively, while still remaining within the extreme category. In November, the UV Index drops to 9, indicating very high exposure again, before reverting to 7 by December, moving back to the high category. Understanding these UV index trends is crucial for residents and visitors, as it helps guide sun safety practices in a region where sunlight is often abundant yet potent.
UV Risk Categories
In Chittagong, Bangladesh, daylight duration exhibits a rhythmic cycle throughout the year, closely aligned with seasonal transitions. January begins with approximately 10 hours of daylight, gradually increasing as the year progresses. February adds an extra hour, bringing the total to 11 hours, while March sees a significant leap to 12 hours. This trend continues into April, where daylight remains steady at 12 hours, before hitting the peak during the summer months of May and June, each benefiting from 13 hours of sunlight.
As summer gives way to monsoon conditions, daylight duration begins to stabilize at a consistent 13 hours in July, before slightly decreasing to 12 hours in August and September. The decline continues into the latter part of the year, with October and November offering 11 hours of daylight each, before returning to 10 hours in December. This cyclical pattern not only affects daily activities but also plays a vital role in shaping the local environment, influencing agricultural practices and biodiversity in the region.
Bandarban, Bangladesh experiences a tropical climate characterized by significant temperature variations and seasonal rainfall. Temperatures range from a minimum of 9°C (49°F) in January to a maximum of 41°C (106°F) in April, with average monthly temperatures typically between 19°C (67°F) and 29°C (84°F). Rainfall is concentrated from June to September, with June recording a substantial 485 mm (19.1 in), while the rest of the year sees much lower precipitation. With abundant sunshine, especially from February to May, Bandarban witnesses up to 347 hours of sun in May, making it a vibrant destination for outdoor activities. For more information, visit Bandarban climate.
Chattogram, Bangladesh experiences a tropical climate characterized by warm temperatures and significant rainfall. The average monthly temperature ranges from a mild 20°C (68°F) in January to around 29°C (84°F) in the peak summer months of April and May. The monsoon season from June to August brings heavy rains, with July recording the highest precipitation at 707 mm (27.8 in). Despite the rainy season, Chattogram enjoys considerable sunshine, peaking at 345 hours in May. For more details, visit Chattogram climate.
The climate in Comilla, Bangladesh, showcases a tropical monsoon pattern with distinct seasonal variations. Temperatures range from a chilly 8°C (47°F) in January to a sweltering 39°C (102°F) in May, while average monthly temperatures hover between 18°C (65°F) and 29°C (84°F). The region experiences its highest rainfall from June to September, with June alone accumulating 415 mm (16.3 in) of precipitation. Sunshine hours vary throughout the year, peaking at 323 hours in May. For more details, visit Comilla climate.
Cox's Bazar, Bangladesh experiences a tropical climate characterized by warm temperatures and significant rainfall. January sees minimum temperatures around 14°C (58°F) and a maximum of 28°C (82°F), while May marks the warmest month with highs reaching 36°C (97°F). The monsoon season, particularly from June to August, brings heavy rainfall, with July receiving up to 769 mm (30.3 in) of precipitation. Sunshine is abundant through most months, peaking at 352 hours in May. For more detailed climate information, visit Cox's Bazar climate.
Khagrachhari, Bangladesh experiences a diverse climate throughout the year, with temperatures ranging from a cool 11°C (53°F) in January to a scorching 39°C (102°F) in May. The region receives significant rainfall, particularly from June to August, with June alone averaging 402 mm (15.8 in). Sunshine hours peak in May at 330 hours, contributing to the warm weather, while the monsoon season brings increased humidity and precipitation. December offers a more temperate climate with mild temperatures and reduced rainfall, making it a pleasant time to visit. For more detailed information, visit Khagrachhari climate.
Teknaf, Bangladesh, experiences a tropical climate characterized by warm temperatures and significant seasonal rainfall. From January to March, temperatures range from a minimum of 18°C (64°F) to a maximum of 31°C (89°F), accompanied by minimal rain. The monsoon season peaks in June and July, with precipitation exceeding 800 mm (31.5 in) monthly, creating a humid environment. Despite the rains, sunshine is abundant, especially from March to May, when the region enjoys over 340 hours of sun per month. For more detailed information, visit Teknaf climate.
In conclusion, Chittagong, Bangladesh, presents a dynamic climate characterized by its temperature variations, precipitation patterns, sunshine duration, UV index, and daylight hours. The city experiences a clear seasonal rhythm, marked by rising temperatures and increased sunlight during the spring and summer months, alongside intense rainfall during the monsoon season. Particularly high UV index levels during these warmer months highlight the importance of sun safety for residents and visitors alike. Understanding these climatic and environmental trends is essential for effective resource management, agricultural planning, and public health awareness, as Chittagong continues to thrive within its vibrant and diverse ecosystem.