Average annual temperature is 12.8 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -11.7 °C
Number of sunny days: 184 days
Number of rainy days: 175 days
Number of snow days: 6 days
Look at detailed online map of Greencastle
* Weather data for Greencastle 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) | 17.0 | 19.8 | 20.2 | 26.5 | 30.0 | 32.1 | 34.5 | 33.1 | 31.2 | 29.3 | 23.5 | 15.6 |
| Average daytime temperature (°C) | 6.1 | 9.9 | 10.8 | 18.1 | 23.4 | 27.7 | 29.4 | 28.0 | 25.6 | 18.9 | 12.1 | 8.4 |
| Average temperature (°C) | 2.3 | 3.8 | 5.0 | 11.2 | 17.3 | 21.5 | 23.8 | 22.7 | 20.1 | 13.9 | 6.6 | 4.3 |
| Average night temperature (°C) | -0.6 | -0.7 | 0.5 | 5.5 | 11.3 | 15.9 | 18.7 | 18.0 | 15.4 | 9.7 | 2.3 | 1.1 |
| Absolute minimum temperature (°C) | -11.1 | -11.7 | -8.1 | -2.9 | 2.3 | 10.7 | 15.0 | 12.4 | 10.6 | -3.6 | -8.8 | -7.5 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 14.9 | 14.7 | 13.7 | 12.5 | 11.2 | 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) | 4.0 | 7.1 | 6.3 | 8.9 | 10.9 | 11.7 | 12.3 | 10.8 | 10.1 | 7.2 | 7.8 | 4.6 |
| Precipitation (mm) | 116 | 72 | 196 | 80 | 37 | 64 | 110 | 121 | 41 | 103 | 33 | 45 |
| Sunny days | 11 | 16 | 15 | 15 | 17 | 18 | 9 | 16 | 18 | 14 | 22 | 13 |
| Rainy days | 16 | 12 | 15 | 15 | 14 | 12 | 22 | 15 | 12 | 17 | 7 | 18 |
| Snow days | 4 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Greencastle during the most sunny months:
The largest precipitation sum in Greencastle is at