| Average climate data for George Town, Cayman Islands | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°F) | 79 | 79 | 81 | 82 | 84 | 86 | 86 | 86 | 86 | 84 | 82 | 80 | 86 |
| Average minimum temperature (°F) | 73 | 71 | 74 | 77 | 79 | 81 | 80 | 80 | 79 | 79 | 77 | 73 | 71 |
| Average precipitation (inch) | 3 | 1 | 1 | 1 | 6 | 5 | 6 | 4 | 7 | 9 | 5 | 4 | 50 |
| Average rainfall days (days) | 5 | 4 | 4 | 4 | 7 | 7 | 7 | 8 | 9 | 10 | 9 | 6 | 80 |
| Average water temperature (°F) | 80 | 80 | 80 | 81 | 83 | 84 | 85 | 86 | 86 | 85 | 83 | 82 | 83 |
| Average daily daylight hours (h) | 11 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 12 |
| Average daily sunshine hours (h) | 8 | 8 | 9 | 10 | 9 | 8 | 9 | 8 | 8 | 8 | 7 | 7 | 8 |
| Average UV index | 8 | 10 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 10 | 8 | 7 | 10 |
The warmest month, with the highest average maximum temperature, is June (86.2 °F). The month with the lowest average maximum temperature is January (78.8 °F). Overall, the average maximum temperature over the whole year is 83 °F.
The month with the highest average minimum temperature is June (80.8 °F). The coldest month, with the lowest average minimum temperature, is February (71.4 °F). Overall, the average minimum temperature over the whole year is 77 °F.
The month with the highest average water temperature is September (85.9 °F). The month with the lowest average water temperature is February (79.8 °F). Overall, the average water temperature over the whole year is 82.9 °F.
The wettest month, with the highest amount of precipitation, is October (8.8 inch). The driest month, with the least amount of precipitation, is February (0.5 inch). Over the whole year there are 50.3 inch of rainfall on average.
The month with the most days of rain is October (10.1 days). The month with the fewest days of rain is April (4 days). Over the whole year there are 79.9 days of rain on average.
The month with the longest days, so the most daylight, is June (Average daylight: 13 h). The month with the shortest days, so the least daylight, is December (Average daylight: 11 h). Over the whole year there are 11.9 h of daylight per day on average.
The month with the most sunshine per day is April (Average sunshine: 9.9 h). The month with the least sunshine per day is December (Average sunshine: 7.1 h). Over the whole year there are 8.2 h of sunlight per day on average.
The months with the highest average UV index are March, April, May, June, July and August (UV index: 12). The month with the lowest average UV index is December (UV index: 7). Over the whole year the average UV index is 10.5.
