Average annual temperature is 11.9 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: -13.7 °C
Number of sunny days: 136 days
Number of rainy days: 217 days
Number of snow days: 12 days
Look at detailed online map of West Derry
* Weather data for West Derry 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) | 17.1 | 19.9 | 20.6 | 27.5 | 29.0 | 32.7 | 31.4 | 31.1 | 31.7 | 26.9 | 18.9 | 17.3 |
| Average daytime temperature (°C) | 7.3 | 10.6 | 10.0 | 18.3 | 21.1 | 24.8 | 27.8 | 26.5 | 23.5 | 17.6 | 11.0 | 8.5 |
| Average temperature (°C) | 3.3 | 4.1 | 4.3 | 11.5 | 14.7 | 18.8 | 22.5 | 21.2 | 18.1 | 12.9 | 5.8 | 4.6 |
| Average night temperature (°C) | 0.4 | -1.0 | -0.2 | 5.8 | 8.3 | 13.3 | 18.4 | 16.7 | 13.7 | 8.9 | 1.7 | 1.6 |
| Absolute minimum temperature (°C) | -6.9 | -13.7 | -8.1 | -3.1 | 1.9 | 7.7 | 14.7 | 11.6 | 8.0 | 0.6 | -7.0 | -4.9 |
| 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 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 11.9 | 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) | 2.7 | 6.2 | 6.0 | 8.6 | 10.3 | 10.8 | 10.9 | 10.6 | 8.6 | 6.4 | 6.6 | 4.0 |
| Precipitation (mm) | 128 | 90 | 121 | 67 | 84 | 160 | 120 | 95 | 41 | 107 | 55 | 81 |
| Sunny days | 5 | 11 | 10 | 13 | 21 | 12 | 3 | 9 | 12 | 14 | 17 | 9 |
| Rainy days | 21 | 16 | 18 | 17 | 10 | 18 | 28 | 22 | 18 | 17 | 11 | 21 |
| Snow days | 5 | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 |
The best time to visit West Derry during the most sunny months:
The largest precipitation sum in West Derry is at