Average annual temperature is 17.8 °C
Absolute maximum temperature: 37.9 °C
Absolute minimum temperature: -4.2 °C
Number of sunny days: 195 days
Number of rainy days: 170 days
Look at detailed online map of Island Forty
* Weather data for Island Forty 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) | 21.9 | 23.9 | 25.1 | 28.2 | 31.8 | 37.9 | 36.0 | 37.8 | 32.8 | 32.1 | 25.9 | 20.1 |
| Average daytime temperature (°C) | 13.1 | 15.3 | 16.9 | 21.8 | 27.7 | 32.0 | 32.9 | 32.5 | 29.7 | 24.0 | 16.9 | 13.5 |
| Average temperature (°C) | 8.7 | 9.8 | 11.9 | 15.9 | 21.9 | 26.0 | 27.8 | 27.4 | 24.1 | 18.9 | 11.6 | 8.5 |
| Average night temperature (°C) | 5.1 | 6.0 | 7.6 | 11.3 | 16.7 | 20.7 | 23.5 | 23.4 | 19.4 | 14.6 | 7.3 | 4.7 |
| Absolute minimum temperature (°C) | -2.8 | -4.2 | -4.1 | 4.5 | 8.3 | 16.0 | 19.3 | 18.0 | 15.5 | 1.0 | -0.7 | -2.3 |
| 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 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.9 | 6.4 | 7.9 | 8.2 | 11.4 | 12.4 | 11.4 | 10.4 | 10.8 | 8.0 | 7.8 | 7.2 |
| Precipitation (mm) | 178 | 105 | 195 | 160 | 63 | 48 | 128 | 126 | 41 | 58 | 64 | 58 |
| Sunny days | 11 | 15 | 16 | 16 | 12 | 14 | 9 | 13 | 20 | 24 | 24 | 21 |
| Rainy days | 20 | 13 | 15 | 14 | 19 | 16 | 22 | 18 | 10 | 7 | 6 | 10 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Island Forty during the most sunny months:
The largest precipitation sum in Island Forty is at