Average annual temperature is 10.5 °C
Absolute maximum temperature: 37.5 °C
Absolute minimum temperature: -25.4 °C
Number of sunny days: 189 days
Number of rainy days: 145 days
Number of snow days: 31 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) | 8.3 | 9.2 | 20.3 | 24.7 | 30.9 | 33.4 | 33.7 | 37.5 | 33.5 | 28.5 | 16.9 | 11.7 |
| Average daytime temperature (°C) | 0.8 | 3.2 | 6.8 | 15.3 | 23.1 | 27.8 | 28.3 | 28.2 | 24.6 | 15.9 | 8.5 | 5.3 |
| Average temperature (°C) | -3.2 | -2.1 | 1.4 | 8.9 | 16.4 | 21.4 | 22.8 | 22.7 | 19.2 | 11.7 | 4.0 | 1.5 |
| Average night temperature (°C) | -6.0 | -6.6 | -2.8 | 3.9 | 10.3 | 15.6 | 18.0 | 18.1 | 15.0 | 8.1 | 0.5 | -1.0 |
| Absolute minimum temperature (°C) | -25.4 | -22.9 | -13.9 | -3.5 | 1.6 | 8.7 | 13.7 | 11.3 | 9.7 | -3.7 | -12.7 | -8.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.9 | 7.1 | 6.6 | 9.0 | 11.9 | 12.5 | 12.4 | 11.4 | 9.6 | 7.0 | 7.2 | 4.1 |
| Precipitation (mm) | 65 | 83 | 74 | 99 | 52 | 28 | 67 | 55 | 88 | 114 | 33 | 46 |
| Sunny days | 15 | 15 | 15 | 16 | 21 | 17 | 13 | 16 | 11 | 12 | 23 | 15 |
| Rainy days | 7 | 9 | 9 | 13 | 10 | 13 | 18 | 15 | 19 | 17 | 5 | 10 |
| Snow days | 9 | 4 | 7 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 6 |
The best time to visit Key West during the most sunny months:
The largest precipitation sum in Key West is at