Average annual temperature is 18.6 °C
Absolute maximum temperature: 42.2 °C
Absolute minimum temperature: -8.2 °C
Number of sunny days: 259 days
Number of rainy days: 105 days
Number of snow days: 1 day
Look at detailed online map of Key
* Weather data for Key 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) | 24.3 | 26.6 | 29.7 | 34.4 | 35.1 | 42.2 | 40.5 | 41.3 | 40.1 | 31.9 | 30.6 | 23.8 |
| Average daytime temperature (°C) | 15.3 | 16.5 | 21.8 | 25.8 | 29.1 | 34.9 | 36.4 | 37.5 | 33.9 | 24.9 | 18.3 | 15.5 |
| Average temperature (°C) | 8.2 | 8.1 | 13.4 | 17.4 | 21.6 | 27.2 | 30.1 | 31.2 | 27.0 | 18.0 | 11.4 | 8.5 |
| Average night temperature (°C) | 2.8 | 2.4 | 7.1 | 10.7 | 15.4 | 20.2 | 23.9 | 24.9 | 20.8 | 12.9 | 6.4 | 3.1 |
| Absolute minimum temperature (°C) | -8.2 | -6.8 | 0.6 | 4.2 | 10.8 | 12.6 | 19.1 | 20.7 | 15.8 | -1.0 | -1.1 | -2.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.3 | 11.0 | 12.0 | 13.0 | 13.8 | 14.3 | 14.1 | 13.3 | 12.4 | 11.4 | 10.5 | 10.0 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 8.0 | 7.8 | 9.9 | 11.1 | 10.7 | 12.3 | 12.6 | 12.0 | 10.5 | 8.8 | 7.7 | 8.1 |
| Precipitation (mm) | 11 | 18 | 2 | 11 | 49 | 70 | 34 | 8 | 19 | 94 | 12 | 48 |
| Sunny days | 25 | 18 | 26 | 22 | 8 | 21 | 24 | 27 | 21 | 20 | 22 | 25 |
| Rainy days | 5 | 10 | 5 | 8 | 23 | 9 | 7 | 4 | 9 | 11 | 8 | 6 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Key during the most sunny months:
The largest precipitation sum in Key is at