Average annual temperature is 6.7 °C
Absolute maximum temperature: 34.0 °C
Absolute minimum temperature: -29.5 °C
Number of sunny days: 148 days
Number of rainy days: 172 days
Number of snow days: 45 days
Look at detailed online map of Northumberland County
* Weather data for Northumberland County 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) | 7.8 | 8.9 | 8.3 | 17.6 | 32.0 | 34.0 | 31.7 | 25.2 | 28.4 | 25.2 | 11.5 | 13.6 |
| Average daytime temperature (°C) | -1.1 | -4.1 | 2.5 | 10.1 | 16.8 | 20.4 | 27.1 | 22.3 | 22.2 | 15.7 | 4.6 | 2.7 |
| Average temperature (°C) | -5.5 | -9.6 | -1.7 | 4.2 | 10.5 | 15.4 | 22.0 | 17.7 | 16.8 | 11.1 | -0.1 | -1.4 |
| Average night temperature (°C) | -9.4 | -14.5 | -5.4 | -0.6 | 5.1 | 11.4 | 18.0 | 14.0 | 12.7 | 7.8 | -3.5 | -4.7 |
| Absolute minimum temperature (°C) | -21.2 | -29.5 | -13.9 | -9.0 | 0.3 | 4.3 | 13.3 | 10.1 | 5.0 | -1.7 | -9.2 | -13.2 |
| 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) | 9.0 | 10.3 | 11.9 | 13.6 | 15.1 | 15.8 | 15.4 | 14.2 | 12.6 | 10.9 | 9.4 | 8.6 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.8 | 7.3 | 6.5 | 8.7 | 9.3 | 6.0 | 10.3 | 8.5 | 8.2 | 5.8 | 5.9 | 4.5 |
| Precipitation (mm) | 156 | 42 | 94 | 38 | 119 | 156 | 139 | 168 | 107 | 110 | 68 | 119 |
| Sunny days | 11 | 16 | 10 | 16 | 14 | 7 | 2 | 5 | 16 | 13 | 17 | 21 |
| Rainy days | 9 | 3 | 8 | 11 | 17 | 23 | 29 | 26 | 14 | 16 | 11 | 5 |
| Snow days | 11 | 9 | 13 | 3 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 5 |
The best time to visit Northumberland County during the most sunny months:
Months with the longest average daylight duration in Northumberland County:
The largest precipitation sum in Northumberland County is at