| Average climate data for Mary's Fancy, Sint Maarten | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°F) | 79 | 79 | 78 | 79 | 81 | 83 | 83 | 83 | 84 | 83 | 82 | 81 | 84 |
| Average minimum temperature (°F) | 77 | 77 | 76 | 77 | 79 | 81 | 81 | 82 | 82 | 82 | 80 | 79 | 76 |
| Average precipitation (inch) | 1 | 1 | 1 | 2 | 3 | 2 | 3 | 4 | 4 | 4 | 3 | 2 | 30 |
| Average rainfall days (days) | 18 | 15 | 16 | 19 | 24 | 21 | 25 | 25 | 22 | 24 | 23 | 21 | 252 |
| Average relative humidity (%) | 76 | 75 | 75 | 75 | 77 | 78 | 79 | 77 | 77 | 75 | 77 | 74 | 76 |
| Average wind speed (mph) | 15 | 15 | 14 | 14 | 14 | 15 | 16 | 15 | 13 | 12 | 13 | 15 | 14 |
| Average daily daylight hours (h) | 11 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 12 |
| Average daily sunshine hours (h) | 7 | 8 | 8 | 10 | 10 | 10 | 10 | 10 | 9 | 6 | 6 | 6 | 8 |
| Average cloud coverage (%) | 35 | 33 | 34 | 37 | 41 | 42 | 41 | 43 | 39 | 38 | 37 | 37 | 38 |
| Average UV index | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
The warmest month, with the highest average maximum temperature, is September (83.9 °F). The month with the lowest average maximum temperature is March (78.2 °F). Overall, the average maximum temperature over the whole year is 81.2 °F.
The month with the highest average minimum temperature is September (82.1 °F). The coldest month, with the lowest average minimum temperature, is March (76.4 °F). Overall, the average minimum temperature over the whole year is 79.4 °F.
The wettest month, with the highest amount of precipitation, is October (4.2 inch). The driest month, with the least amount of precipitation, is February (0.7 inch). Over the whole year there are 30.4 inch of rainfall on average.
The month with the most days of rain is August (25.2 days). The month with the fewest days of rain is February (14.8 days). Over the whole year there are 252.3 days of rain on average.
The month with the highest average relative humidity is July (79.1 %). The month with the lowest average relative humidity is December (74 %). The overall average relative humidity over the whole year is 76.3 %.
The windiest month, with the highest average wind speed, is July (16.1 mph). The calmest month, with the lowest average wind speed, is October (12.4 mph). The overall average wind speed over the whole year is 14.3 mph.
The month with the cloudiest skies, so the highest cloud coverage, is August (43 %). The month with the clearest skies, so the lowest cloud coverage, is February (33.2 %). Over the whole year there is an average cloud coverage of 38.1 %.
The months with the longest days, so the most daylight, are June and July (Average daylight: 13 h). The months with the shortest days, so the least daylight, are January and 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 August (Average sunshine: 10.1 h). The month with the least sunshine per day is October (Average sunshine: 6 h). Over the whole year there are 8.4 h of sunlight per day on average.
Over the whole year the average UV index is 7.
