Average annual temperature is 9.1 °C
Absolute maximum temperature: 25.3 °C
Absolute minimum temperature: -6.6 °C
Number of sunny days: 62 days
Number of rainy days: 300 days
Number of snow days: 3 days
Look at detailed online map of Greencastle
* Weather data for Greencastle United Kingdom is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 10.9 | 11.7 | 13.2 | 16.1 | 21.2 | 25.3 | 20.5 | 21.1 | 24.6 | 18.7 | 11.5 | 10.8 |
| Average daytime temperature (°C) | 6.1 | 8.1 | 8.0 | 10.9 | 14.9 | 19.9 | 15.9 | 16.7 | 16.5 | 12.3 | 7.7 | 7.1 |
| Average temperature (°C) | 4.0 | 5.8 | 4.9 | 7.5 | 11.0 | 15.7 | 13.0 | 13.6 | 13.2 | 9.8 | 5.4 | 5.4 |
| Average night temperature (°C) | 1.9 | 3.2 | 2.0 | 4.0 | 6.8 | 11.6 | 10.3 | 10.8 | 10.1 | 7.5 | 2.9 | 3.7 |
| Absolute minimum temperature (°C) | -5.0 | -2.4 | -6.6 | -0.5 | 2.7 | 7.9 | 7.5 | 7.2 | 4.8 | -0.5 | -3.0 | -2.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 8.0 | 10.0 | 12.0 | 15.0 | 16.0 | 17.0 | 17.0 | 15.0 | 13.0 | 11.0 | 9.0 | 7.0 |
| Daylight mean duration (h) | 7.9 | 9.7 | 11.9 | 14.1 | 16.1 | 17.2 | 16.7 | 14.9 | 12.7 | 10.5 | 8.5 | 7.4 |
| Daylight minimum duration (h) | 7.0 | 8.0 | 10.0 | 13.0 | 15.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 7.0 | 7.0 |
| Sunshine mean duration (h) | 2.9 | 2.9 | 4.3 | 7.0 | 8.4 | 12.0 | 8.5 | 8.9 | 6.7 | 4.2 | 4.1 | 1.9 |
| Precipitation (mm) | 105 | 57 | 152 | 128 | 52 | 84 | 198 | 140 | 148 | 112 | 104 | 200 |
| Sunny days | 5 | 5 | 4 | 4 | 11 | 9 | 0 | 3 | 4 | 5 | 8 | 4 |
| Rainy days | 25 | 23 | 25 | 26 | 20 | 21 | 31 | 28 | 26 | 26 | 22 | 27 |
| Snow days | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Greencastle during the most sunny months:
Months with the longest average daylight duration in Greencastle:
The largest precipitation sum in Greencastle is at