Last updated: January 18, 2025
Jaluit Atoll, located in the Marshall Islands, exhibits a tropical rainforest climate classified under the Köppen-Geiger system as Af. Characterized by consistently warm temperatures, the atoll experiences minimum temperatures around 25°C (77°F) in March and averages approximately 27°C (81°F) throughout the year. The peak warmth occurs in August, where maximum temperatures can reach 30°C (86°F). This stable climate, enriched by high humidity and ample rainfall, supports a diverse range of flora and fauna, making Jaluit Atoll a unique ecosystem within the Pacific region.
The temperature patterns at Jaluit Atoll in the Marshall Islands reveal a remarkably stable and warm tropical climate throughout the year. Monthly minimum temperatures consistently hover around 25°C (77°F to 78°F), while average temperatures maintain a steady 27°C (81°F), reflecting the atoll's equatorial location. Seasonal variations are minimal, with maximum temperatures predominantly peaking at 29°C (84°F to 85°F) from January to July. Notably, August marks a slight increase, reaching up to 30°C (86°F), before settling back to the 29°C (85°F) range in the subsequent months of September and October. This consistent warmth, combined with slight fluctuations, underscores the atoll’s predominantly tropical characteristics, conducive to lush biodiversity.
In Jabor, the climate experiences a minimum temperature of 25°C (77°F) in March, rising to a maximum of 30°C (86°F) by August, making it a warm destination throughout the year. For more detailed monthly temperature information, you can refer to the link: monthly temperatures in Jabor.
Jaluit Atoll experiences a significant amount of precipitation throughout the year, characteristic of its tropical rainforest climate. The monthly rainfall shows considerable variation, with May recording the highest average precipitation at 442 mm (17.4 in), contributing to the region's lush vegetation. Other months, such as March and April, also see substantial rainfall, averaging around 309 mm (12.2 in) and 305 mm (12.0 in), respectively. The number of rainy days per month typically ranges from 21 to 29, indicating that moisture is a constant component of the atoll's weather system.
Despite these high levels of precipitation, there are seasonal trends that define Jaluit's climate. The late spring and early summer months—particularly May, June, and July—are marked by heavy rainfall, with May also experiencing the highest number of rainy days at 29. Conversely, the months of February and October display relatively lower precipitation levels, with 202 mm (7.9 in) and 239 mm (9.4 in) respectively, although rain remains frequent. Overall, the persistent moisture throughout the year is crucial to sustaining the diverse ecosystems present on the atoll.
Jaluit Atoll enjoys a noteworthy amount of sunshine throughout the year, with a clear seasonal trend highlighting a steady increase in sunshine hours as the year progresses. Starting with 219 hours in January, there is a gradual rise, peaking in **August, which boasts an impressive 294 hours of sunshine. This summer apex is complemented by July and September, where sunshine hours are also notably high, reaching 284 hours and 278 hours, respectively. This surge in sunlight during the summer months not only enhances the atoll's vibrant ecosystems but also indicates favorable conditions for outdoor activities and tourism.
Conversely, the months at the beginning and end of the year—particularly January and November—experience some of the lowest sunshine durations. January, with its 219 hours, transitions into a slightly brighter February at 256 hours, but overall, the winter months do not match the summer's sunlit abundance. As the year approaches its conclusion, sunshine hours remain moderate, with December providing 265 hours of sunlight. This seasonal pattern highlights the overall trend of longer daylight hours as Jaluit Atoll moves from winter to summer, significantly impacting its climate and biological diversity throughout the year.
The UV Index in Jaluit Atoll reveals consistently extreme levels of ultraviolet radiation throughout the year, underscoring the importance of sun safety. Ranging from an index of 11 in December to a peak of 16 in both March and April, individuals are advised to take precautionary measures at all times due to the high risk of harm from unprotected sun exposure. This extreme classification is evidenced by the remarkably short burn time of just 10 minutes, indicating that brief outdoor activities can quickly lead to skin damage without adequate protection.
Notably, the months of February and March register the highest UV Index values, with February at 15 and March at 16, highlighting a peak period for sun intensity and potential health risks. Following this peak, the UV Index remains fairly stable, predominantly at 14, extending through May to September, before slightly decreasing in the fall and winter months. Even during the lowest months, such as November and December, the UV Index remains significant, emphasizing the need for protective measures year-round for residents and visitors alike.
UV Risk Categories
In Jaluit Atoll, the duration of daylight remains relatively consistent throughout the year, revealing a unique characteristic of this tropical region. Both January and February enjoy about 11 hours of daylight, maintaining a steady rhythm as the year begins. As spring approaches, daylight gradually increases to a maximum of 12 hours from March through September, offering extended opportunities for activities under the sun. This stable duration of daylight reflects the atoll's equatorial location, where significant seasonal variations are minimal.
As the year transitions into autumn, daylight duration begins to decrease again, dropping back to 11 hours in October, November, and December. This cyclical pattern indicates that residents and visitors can generally expect balanced light exposure throughout the seasons. The consistent daylight hours play a crucial role in supporting the biodiversity characteristic of Jaluit Atoll, promoting a rich ecosystem that thrives under the warm tropical sun.
The climate in Jabor, Marshall Islands, is characterized by warm temperatures year-round, with average temperatures consistently around 27°C (81°F). Monthly highs typically reach between 29°C (84°F) to 30°C (86°F), while lows remain stable at 25°C (78°F). Precipitation is substantial, peaking in May at 442 mm (17.4 in) and generally fluctuating between 202 mm (7.9 in) and 442 mm across the months. Sunshine hours are plentiful, averaging around 265 hours per month, with August receiving the most at 294 hours. For more detailed information, visit Jabor climate.
In conclusion, Jaluit Atoll's climate is defined by its warm temperatures, significant precipitation, abundant sunshine, high UV Index, and consistent daylight duration throughout the year. The tropical rainforest climate, marked by extreme UV radiation and substantial rainfall, creates favorable conditions for diverse ecosystems and vibrant wildlife. As daylight varies minimally across the seasons, sunlight supports not only ecological vitality but also recreational opportunities. Understanding these climatic elements is crucial for both residents and visitors, as proper sun protection and awareness of local weather patterns are essential for enjoying the natural beauty and resources of this unique Pacific paradise.