Average annual temperature is 7.7 °C
Absolute maximum temperature: 36.3 °C
Absolute minimum temperature: -25.6 °C
Number of sunny days: 200 days
Number of rainy days: 124 days
Number of snow days: 41 days
Look at detailed online map of Flathead County
* Weather data for Flathead County 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) | 4.9 | 6.9 | 10.6 | 25.1 | 28.1 | 28.8 | 34.1 | 36.3 | 26.1 | 22.0 | 10.4 | 8.0 |
| Average daytime temperature (°C) | 0.3 | 2.0 | 5.9 | 12.4 | 22.0 | 23.5 | 28.8 | 28.4 | 20.7 | 12.8 | 5.8 | 3.9 |
| Average temperature (°C) | -3.7 | -2.9 | -1.2 | 5.2 | 14.1 | 16.5 | 20.7 | 20.2 | 14.2 | 6.9 | 1.0 | -0.1 |
| Average night temperature (°C) | -7.2 | -6.5 | -6.5 | -0.5 | 7.1 | 9.9 | 12.4 | 13.4 | 8.5 | 2.2 | -2.3 | -2.8 |
| Absolute minimum temperature (°C) | -25.6 | -23.9 | -12.4 | -6.8 | 0.6 | 4.2 | 8.0 | 8.2 | 1.5 | -8.3 | -8.2 | -9.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.9 | 10.2 | 11.9 | 13.7 | 15.2 | 16.0 | 15.6 | 14.3 | 12.6 | 10.8 | 9.3 | 8.4 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.5 | 4.9 | 8.8 | 10.0 | 11.7 | 12.6 | 14.2 | 11.4 | 9.8 | 8.1 | 5.8 | 3.6 |
| Precipitation (mm) | 18 | 28 | 22 | 23 | 76 | 43 | 3 | 61 | 49 | 30 | 42 | 20 |
| Sunny days | 17 | 10 | 16 | 13 | 17 | 13 | 27 | 22 | 17 | 17 | 15 | 16 |
| Rainy days | 6 | 8 | 3 | 14 | 14 | 17 | 4 | 9 | 13 | 13 | 14 | 9 |
| Snow days | 8 | 10 | 12 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 6 |
The best time to visit Flathead County during the most sunny months:
Months with the longest average daylight duration in Flathead County:
The largest precipitation sum in Flathead County is at