Average annual temperature is 11.7 °C
Absolute maximum temperature: 38.3 °C
Absolute minimum temperature: -10.9 °C
Number of sunny days: 163 days
Number of rainy days: 201 days
Number of snow days: 1 day
Look at detailed online map of Deer Island
* Weather data for Deer Island 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) | 13.3 | 13.8 | 18.0 | 29.1 | 30.8 | 30.2 | 33.7 | 38.3 | 31.9 | 26.9 | 17.0 | 14.1 |
| Average daytime temperature (°C) | 8.7 | 7.7 | 10.7 | 13.6 | 22.4 | 23.7 | 28.5 | 30.0 | 23.2 | 17.9 | 11.7 | 10.4 |
| Average temperature (°C) | 5.5 | 3.5 | 5.4 | 8.4 | 15.3 | 16.2 | 19.8 | 21.4 | 16.4 | 12.8 | 7.8 | 7.3 |
| Average night temperature (°C) | 3.2 | 0.7 | 1.9 | 5.0 | 10.3 | 11.0 | 13.4 | 15.6 | 12.3 | 9.7 | 5.2 | 5.2 |
| Absolute minimum temperature (°C) | -5.3 | -10.9 | -6.2 | -0.3 | 6.6 | 7.2 | 10.6 | 11.2 | 8.3 | 1.5 | -1.5 | 1.2 |
| 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 | 8.0 |
| Daylight mean duration (h) | 9.1 | 10.4 | 11.9 | 13.6 | 14.9 | 15.7 | 15.3 | 14.1 | 12.5 | 10.9 | 9.5 | 8.7 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 2.8 | 4.3 | 5.2 | 5.8 | 10.8 | 11.8 | 12.8 | 11.3 | 8.2 | 6.3 | 5.0 | 2.9 |
| Precipitation (mm) | 143 | 120 | 168 | 241 | 41 | 55 | 4 | 27 | 90 | 141 | 169 | 278 |
| Sunny days | 7 | 9 | 3 | 6 | 14 | 22 | 27 | 21 | 17 | 17 | 12 | 8 |
| Rainy days | 24 | 18 | 28 | 24 | 17 | 8 | 4 | 10 | 13 | 14 | 18 | 23 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Deer Island during the most sunny months:
Months with the longest average daylight duration in Deer Island:
The largest precipitation sum in Deer Island is at