Average annual temperature is 6.8 °C
Absolute maximum temperature: 28.5 °C
Absolute minimum temperature: -29.6 °C
Number of sunny days: 120 days
Number of rainy days: 200 days
Number of snow days: 45 days
Look at detailed online map of Londonderry
* Weather data for Londonderry Canada is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 9.8 | 8.7 | 7.6 | 16.6 | 24.0 | 27.7 | 28.5 | 24.3 | 28.4 | 21.8 | 13.8 | 14.1 |
| Average daytime temperature (°C) | 1.6 | -1.9 | 1.7 | 10.2 | 13.8 | 19.3 | 24.7 | 21.4 | 20.5 | 14.9 | 4.8 | 2.9 |
| Average temperature (°C) | -2.1 | -7.1 | -2.2 | 4.5 | 8.3 | 14.6 | 20.6 | 17.3 | 16.1 | 10.8 | 0.8 | -0.5 |
| Average night temperature (°C) | -6.2 | -12.4 | -5.7 | -0.1 | 3.9 | 11.1 | 17.1 | 13.8 | 12.9 | 7.6 | -2.5 | -3.6 |
| Absolute minimum temperature (°C) | -14.6 | -29.6 | -11.9 | -8.4 | -0.7 | 6.2 | 12.9 | 10.0 | 6.4 | -0.9 | -9.5 | -12.7 |
| 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) | 9.2 | 10.4 | 11.9 | 13.5 | 14.9 | 15.6 | 15.3 | 14.1 | 12.5 | 10.9 | 9.5 | 8.8 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 3.0 | 4.9 | 5.2 | 8.6 | 8.9 | 6.4 | 8.8 | 8.0 | 7.6 | 6.1 | 4.6 | 3.1 |
| Precipitation (mm) | 267 | 64 | 93 | 50 | 65 | 218 | 176 | 266 | 83 | 162 | 148 | 151 |
| Sunny days | 6 | 11 | 11 | 16 | 13 | 7 | 7 | 7 | 10 | 10 | 9 | 13 |
| Rainy days | 15 | 9 | 7 | 12 | 18 | 23 | 24 | 24 | 20 | 21 | 14 | 13 |
| Snow days | 10 | 8 | 13 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 5 |
The best time to visit Londonderry during the most sunny months:
Months with the longest average daylight duration in Londonderry:
The largest precipitation sum in Londonderry is at