Average annual temperature is 27.0 °C
Absolute maximum temperature: 30.3 °C
Absolute minimum temperature: 21.7 °C
Number of sunny days: 93 days
Number of rainy days: 272 days
Look at detailed online map of Koolbaai
* Weather data for Koolbaai Sint Maarten is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 26.7 | 25.9 | 26.5 | 27.2 | 28.2 | 29.1 | 29.4 | 30.1 | 30.3 | 30.2 | 29.0 | 28.5 |
| Average daytime temperature (°C) | 25.9 | 25.5 | 25.7 | 26.1 | 27.8 | 28.7 | 29.1 | 29.4 | 29.8 | 29.2 | 28.3 | 27.1 |
| Average temperature (°C) | 25.1 | 24.8 | 25.1 | 25.3 | 27.1 | 28.0 | 28.4 | 28.6 | 29.1 | 28.4 | 27.7 | 26.5 |
| Average night temperature (°C) | 24.2 | 23.9 | 24.4 | 24.2 | 26.3 | 27.2 | 27.4 | 27.5 | 27.9 | 27.2 | 26.7 | 25.7 |
| Absolute minimum temperature (°C) | 22.8 | 22.9 | 22.7 | 21.7 | 24.2 | 25.5 | 26.0 | 25.7 | 25.7 | 25.2 | 25.1 | 23.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.2 | 11.6 | 12.0 | 12.6 | 13.0 | 13.2 | 13.1 | 12.7 | 12.2 | 11.7 | 11.3 | 11.1 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.3 | 10.8 | 11.1 | 11.4 | 11.8 | 11.7 | 11.2 | 10.7 | 11.4 | 9.0 | 9.9 | 10.0 |
| Precipitation (mm) | 83 | 24 | 13 | 59 | 37 | 62 | 42 | 102 | 32 | 240 | 43 | 23 |
| Sunny days | 4 | 3 | 16 | 5 | 8 | 7 | 7 | 10 | 8 | 5 | 7 | 13 |
| Rainy days | 27 | 25 | 15 | 25 | 23 | 23 | 24 | 21 | 22 | 26 | 23 | 18 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Koolbaai is at