Average annual temperature is 26.1 °C
Absolute maximum temperature: 31.9 °C
Absolute minimum temperature: 14.3 °C
Number of sunny days: 135 days
Number of rainy days: 230 days
Look at detailed online map of Key West
* Weather data for Key West United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 25.1 | 26.4 | 26.8 | 28.4 | 29.2 | 30.4 | 31.7 | 31.9 | 30.8 | 30.7 | 27.6 | 26.6 |
| Average daytime temperature (°C) | 23.3 | 24.9 | 25.2 | 26.5 | 27.2 | 29.1 | 30.7 | 30.6 | 29.7 | 28.1 | 26.1 | 23.8 |
| Average temperature (°C) | 22.3 | 24.0 | 24.3 | 25.6 | 26.3 | 28.0 | 29.6 | 29.6 | 28.7 | 27.0 | 25.1 | 22.7 |
| Average night temperature (°C) | 21.1 | 23.1 | 23.5 | 24.5 | 25.2 | 26.3 | 28.2 | 28.3 | 27.2 | 25.9 | 24.2 | 21.7 |
| Absolute minimum temperature (°C) | 14.3 | 19.2 | 19.1 | 21.8 | 22.4 | 23.3 | 26.0 | 26.1 | 23.9 | 21.9 | 20.5 | 16.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.8 | 11.3 | 12.0 | 12.7 | 13.3 | 13.6 | 13.5 | 13.0 | 12.3 | 11.6 | 11.0 | 10.6 |
| Daylight minimum duration (h) | 10.0 | 11.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 9.8 | 10.4 | 10.5 | 11.4 | 12.3 | 12.1 | 12.1 | 11.1 | 10.0 | 10.2 | 9.3 | 7.2 |
| Precipitation (mm) | 5 | 11 | 39 | 79 | 64 | 104 | 92 | 148 | 106 | 52 | 77 | 139 |
| Sunny days | 21 | 16 | 17 | 10 | 15 | 7 | 9 | 4 | 3 | 7 | 13 | 13 |
| Rainy days | 10 | 12 | 14 | 20 | 16 | 23 | 22 | 27 | 27 | 24 | 17 | 18 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Key West is at