Average annual temperature is 12.3 °C
Absolute maximum temperature: 33.2 °C
Absolute minimum temperature: -11.5 °C
Number of sunny days: 176 days
Number of rainy days: 178 days
Number of snow days: 11 days
Look at detailed online map of Castine
* Weather data for Castine 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) | 17.5 | 19.5 | 21.2 | 26.0 | 30.5 | 32.0 | 33.2 | 31.5 | 32.1 | 29.1 | 24.0 | 15.5 |
| Average daytime temperature (°C) | 5.7 | 10.3 | 10.5 | 17.1 | 22.2 | 26.0 | 28.4 | 26.9 | 25.3 | 18.5 | 11.9 | 8.4 |
| Average temperature (°C) | 2.1 | 3.8 | 4.6 | 10.9 | 16.1 | 20.4 | 23.4 | 21.9 | 19.6 | 13.5 | 6.1 | 4.1 |
| Average night temperature (°C) | -0.9 | -0.6 | 0.2 | 5.6 | 10.5 | 14.8 | 18.8 | 17.3 | 14.4 | 9.4 | 2.2 | 1.2 |
| Absolute minimum temperature (°C) | -10.3 | -11.5 | -8.4 | 0.1 | 2.7 | 9.9 | 15.3 | 11.2 | 9.5 | -3.4 | -8.7 | -6.3 |
| 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 | 15.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.4 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.9 | 7.3 | 7.2 | 8.7 | 10.3 | 10.5 | 12.0 | 11.1 | 9.7 | 7.3 | 7.7 | 4.6 |
| Precipitation (mm) | 118 | 65 | 148 | 59 | 65 | 89 | 85 | 131 | 25 | 60 | 27 | 45 |
| Sunny days | 10 | 17 | 13 | 15 | 18 | 11 | 10 | 12 | 20 | 12 | 24 | 14 |
| Rainy days | 16 | 10 | 14 | 15 | 13 | 19 | 21 | 19 | 10 | 18 | 6 | 17 |
| Snow days | 5 | 1 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
The best time to visit Castine during the most sunny months:
The largest precipitation sum in Castine is at