Average annual temperature is 7.0 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -27.2 °C
Number of sunny days: 200 days
Number of rainy days: 119 days
Number of snow days: 46 days
Look at detailed online map of Helena Valley Northwest
* Weather data for Helena Valley Northwest 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) | 6.1 | 10.5 | 11.0 | 23.8 | 29.1 | 29.9 | 35.2 | 35.9 | 29.6 | 22.9 | 15.2 | 13.3 |
| Average daytime temperature (°C) | 0.2 | 2.1 | 3.4 | 11.5 | 21.7 | 22.0 | 29.7 | 28.7 | 22.2 | 12.5 | 6.9 | 3.4 |
| Average temperature (°C) | -4.6 | -4.2 | -2.8 | 3.8 | 14.4 | 15.5 | 21.4 | 20.0 | 14.3 | 5.9 | 0.7 | -1.3 |
| Average night temperature (°C) | -8.2 | -8.9 | -6.9 | -2.3 | 7.7 | 9.4 | 12.6 | 12.8 | 7.6 | 0.9 | -3.6 | -4.6 |
| Absolute minimum temperature (°C) | -26.1 | -27.2 | -13.2 | -12.1 | 1.1 | 2.7 | 8.2 | 9.4 | 1.1 | -11.6 | -9.0 | -11.3 |
| 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 | 15.0 | 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) | 5.2 | 6.4 | 7.9 | 9.8 | 11.8 | 11.7 | 13.9 | 11.1 | 10.0 | 7.5 | 6.8 | 5.4 |
| Precipitation (mm) | 21 | 13 | 29 | 47 | 54 | 53 | 3 | 49 | 57 | 34 | 10 | 6 |
| Sunny days | 18 | 16 | 13 | 12 | 11 | 6 | 24 | 22 | 17 | 18 | 20 | 23 |
| Rainy days | 2 | 3 | 3 | 12 | 20 | 24 | 7 | 9 | 13 | 11 | 10 | 5 |
| Snow days | 11 | 9 | 15 | 6 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 3 |
The best time to visit Helena Valley Northwest during the most sunny months:
Months with the longest average daylight duration in Helena Valley Northwest:
The largest precipitation sum in Helena Valley Northwest is at