| Average climate data for Kwajalein, Marshall Islands | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 31 |
| Average minimum temperature (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Average precipitation (mm) | 163 | 124 | 142 | 198 | 230 | 228 | 262 | 253 | 271 | 286 | 248 | 208 | 2,613 |
| Average rainfall days (days) | 21 | 19 | 19 | 18 | 17 | 16 | 19 | 20 | 18 | 19 | 18 | 20 | 224 |
| Average water temperature (°C) | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 |
| Average daily daylight hours (h) | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 12 |
| Average daily sunshine hours (h) | 21 | 19 | 19 | 18 | 17 | 16 | 19 | 20 | 18 | 19 | 18 | 20 | 19 |
| Average UV index | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 10 | 12 |
The warmest month, with the highest average maximum temperature, is September (31.1 °C). The month with the lowest average maximum temperature is December (29.9 °C). Overall, the average maximum temperature over the whole year is 30.5 °C.
The month with the highest average minimum temperature is January (25.1 °C). The coldest month, with the lowest average minimum temperature, is September (24.9 °C). Overall, the average minimum temperature over the whole year is 25 °C.
The month with the highest average water temperature is August (29.1 °C). The month with the lowest average water temperature is March (27.9 °C). Overall, the average water temperature over the whole year is 28.5 °C.
The wettest month, with the highest amount of precipitation, is October (285.8 mm). The driest month, with the least amount of precipitation, is February (124.1 mm). Over the whole year there are 2,613.2 mm of rainfall on average.
The month with the most days of rain is January (21.1 days). The month with the fewest days of rain is June (16 days). Over the whole year there are 224.1 days of rain on average.
The months with the longest days, so the most daylight, are June and July (Average daylight: 12.1 h). The months with the shortest days, so the least daylight, are January, November and December (Average daylight: 11.1 h). Over the whole year there are 11.6 h of daylight per day on average.
The month with the most sunshine per day is January (Average sunshine: 21 h). The month with the least sunshine per day is June (Average sunshine: 16 h). Over the whole year there are 18.7 h of sunlight per day on average.
The months with the highest average UV index are February, March, April, May, June, July, August, September and October (UV index: 12). The month with the lowest average UV index is December (UV index: 10). Over the whole year the average UV index is 11.7.
