Climate and monthly weather forecastKwajalein, Marshall Islands

The climate of Kwajalein

Kwajalein, located in the Marshall Islands, boasts of a tropical rainforest climate, correctly delineated by the Köppen climate classification as Af. Being nestled in the Pacific Ocean, the weather conditions throughout the year are significantly affected by the maritime influences.

Consistency rules the temperature patterns in Kwajalein, with slim variances observed all year round. With an average high of 30°C (86°F) to 31°C (87.8°F) and an average low of 25°C (77°F), the narrow temperature range presents minimal fluctuations. Regular rainfall is a dominant feature of this tropical rainforest climate, with monthly averages falling in the range of 123mm (4.84") to 282mm (11.1"). Days of rainfall vary marginally, from a low of 16 to a high of 21 days each month.

Sunlight hours are fairly uniform, with an average of roughly 12 hours of daylight. Sunshine hours range from 16h to 21h, suggestive of a predominately sunny climate, while the sea maintains a steady temperature, oscillating between 28°C (82.4°F) to 29°C (84.2°F) throughout the year. Heat and sunlight combine to a UV index remaining around 12 for most of the year, cautioning residents and visitors to take adequate measures to protect against extreme sunburn.

The best time to visit Kwajalein

Identifying the best time to visit Kwajalein depends primarily on an individual’s tolerance for rainfall. Despite a generally consistent climate, the amount of rainfall does fluctuate, presenting some options for the discerning traveller. Those seeking to evade exceedingly wet conditions would find the early part of the year, specifically from February to April, relatively drier, with rainfall amounts ranging from 123mm (4.84") to 198mm (7.8"). It is worthwhile mentioning that the sea temperature remains steady at 28°C (82.4°F) during these months, complementing the sun-soaked days and facilitating various water activities.

The worst time to visit Kwajalein

Considerations of the worst time to visit Kwajalein must likewise be calibrated to fit the individual’s preference or aversion to wet weather. The months between July and November, with rainfall amounts rising to 251mm (9.88") to 282mm (11.1"), can be categorised as excessively wet. Travellers whose activities might be hampered by increased rain may deem these months less favourable.

Spring weather in Kwajalein

Spring seasons in Kwajalein, from March to May, are marked by a gradual increase in overall rainfall from 140mm (5.51") to 229mm (9.02"). Temperatures during these months maintain the consistent pattern, with highs of 30°C (86°F) to 31°C (87.8°F) and lows of 25°C (77°F), while daylight increases from 12.1h to 12.5h. These months also mark a decrease in the UV index from 12 to 11.

Summer weather in Kwajalein

The summer months in Kwajalein, between June and August, are distinguished by a steady climb in rainfall, peaking at 263mm (10.35") in July. Sea temperatures warm slightly to 29°C (84.2°F), maintaining this through to September. Despite increased rainfall, sunshine remains abundant, with levels ranging between 16h to 20h.

Autumn weather in Kwajalein

Autumn in Kwajalein, from September to November, experiences the heaviest rainfall. Rainfall amounts hover between 270mm (10.63") to 282mm (11.1"), while the low temperature remains unchanged at 25°C (77°F). Daylight hours subtly decrease, with the latter part of autumn experiencing an average daylight of 11.9h.

Winter weather in Kwajalein

Winter in Kwajalein, stretching from December to February, witnesses a decline in rainfall to a low of 123mm (4.84") in February. Temperatures remain consistent, with no significant changes from the rest of the year. Daylight hours decrease marginally, resting at an average of 11.6h in December, before increasing again. The UV index also declines to 11 in December and 10 in February, reflecting diminished but still significant solar radiations.

Weather in January

Being the first month of the year, January sets the tone for the weather conditions on Kwajalein, Marshall Islands. Consistent and stable temperatures combined with a significant amount of rainfall characterize the month. The highest recorded rainfall in January is 164mm (6.46"), making it a month with substantial precipitation. Weather in January »

Weather in February

Comparatively, February follows January's trend with similar weather patterns. High temperatures and moderate rainfall define February in Kwajalein, Marshall Islands. Weather conditions, however, seem slightly milder than in January, with rainfall measuring up to 123mm (4.84"). Weather in February »

Weather in March

March progresses with little deviation from the established annual weather pattern. Generally, high temperatures persist with rainfall reciprocating between 123mm (4.84") in February to 140mm (5.51") in March. Weather conditions in Kwajalein, Marshall Islands, thus remain predictably warm and considerably wet during this period. Weather in March »

Weather in April

In line with the preceding months, April’s weather maintains the recurring theme of warm temperatures and significant rainfall. The rise from 140mm (5.51") in March to 198mm (7.8") in April indicates an increase in precipitation. Weather in April »

Weather in May

May presents a continuation of the prevailing weather conditions. The rainfall reaches a high of 229mm (9.02"), indicating another rise in precipitation. However, this heightened rainfall does not bring about a reduction in temperature for Kwajalein, Marshall Islands. Weather in May »

Weather in June

June marks the middle of the year with minor variations in weather conditions. With rainfall at a significant 228mm (8.98"), there is very little departure from May's weather pattern. June's record indicates it is a continuation of the previous few months, showing a trend towards a wetter climate for Kwajalein, Marshall Islands. Weather in June »

Weather in July

July's weather offers no surprises, following a stable weather pattern characterized by high heat and rainfall. Rainfall rises slightly to 263mm (10.35"), indicating a marginally wetter period compared to June. Despite fluctuations in precipitation, the climatic conditions in Kwajalein, Marshall Islands remain consistent. Weather in July »

Weather in August

The weather in August closely mirrors that of July. Precipitation figures clock at 251mm (9.88"), dropping from July's 263mm (10.35"), although maintaining a high level of rainfall. Kwajalein continues to experience warm temperatures combined with heavy rains. Weather in August »

Weather in September

September on Kwajalein, Marshall Islands continues to exhibit a tropical climate. The rainfall level recorded is 270mm (10.63"), marking an increase from August. Notably consistent weather conditions provide no drastic changes in temperature or UV index. Weather in September »

Weather in October

October unveils itself on Kwajalein, Marshall Islands, with continued warm temperatures and high precipitation levels. The rainfall hits a high of 282mm (11.1"), representing the highest precipitation level of the year. As with the previous months, high temperatures maintain the tropical environment in Kwajalein. Weather in October »

Weather in November

Following the rain-drenched October, November offers a slight respite with precipitation coming to a more moderate 246mm (9.69"). Indicative of the weather patterns throughout the year, November continues to be warm with substantial rainfall. Weather in November »

Weather in December

Closing the year, December continues the trend set by November with only slight deviations. The rainfall eases further to 211mm (8.31"), presenting a noticeable change from November's weather. Even so, high temperatures persist throughout December on Kwajalein maintaining the tropical climate. Weather in December »