Average annual temperature is 9.0 °C
Absolute maximum temperature: 31.6 °C
Absolute minimum temperature: -30.4 °C
Number of sunny days: 133 days
Number of rainy days: 195 days
Number of snow days: 37 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) | 5.7 | 10.9 | 7.7 | 26.9 | 29.7 | 31.4 | 30.4 | 26.8 | 31.6 | 27.3 | 13.1 | 10.6 |
| Average daytime temperature (°C) | 0.5 | 1.7 | 3.8 | 14.0 | 19.3 | 23.4 | 26.0 | 23.6 | 22.7 | 15.1 | 6.1 | 3.9 |
| Average temperature (°C) | -2.7 | -3.7 | -0.6 | 8.0 | 13.1 | 18.7 | 21.5 | 19.3 | 17.6 | 11.7 | 2.6 | 1.0 |
| Average night temperature (°C) | -5.8 | -8.5 | -4.3 | 3.2 | 7.6 | 14.4 | 17.4 | 15.6 | 13.4 | 9.0 | -0.5 | -1.3 |
| Absolute minimum temperature (°C) | -18.2 | -30.4 | -11.9 | -7.7 | 1.5 | 10.2 | 13.5 | 10.4 | 7.5 | -1.2 | -6.4 | -10.6 |
| 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 | 9.0 |
| Daylight mean duration (h) | 9.3 | 10.5 | 11.9 | 13.5 | 14.8 | 15.4 | 15.1 | 14.0 | 12.5 | 11.0 | 9.6 | 8.9 |
| 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) | 3.1 | 5.5 | 6.4 | 8.7 | 11.4 | 11.0 | 11.7 | 10.8 | 9.8 | 5.4 | 5.8 | 2.7 |
| Precipitation (mm) | 93 | 79 | 99 | 104 | 47 | 84 | 134 | 77 | 13 | 62 | 50 | 105 |
| Sunny days | 7 | 10 | 14 | 11 | 21 | 8 | 4 | 8 | 17 | 11 | 12 | 10 |
| Rainy days | 12 | 10 | 8 | 17 | 10 | 22 | 27 | 23 | 13 | 20 | 14 | 19 |
| Snow days | 12 | 8 | 9 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 2 |
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