Average annual temperature is 7.9 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: -27.3 °C
Number of sunny days: 223 days
Number of rainy days: 111 days
Number of snow days: 31 days
Look at detailed online map of Flathead Reservation
* Weather data for Flathead Reservation 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) | 3.1 | 5.3 | 12.2 | 26.8 | 29.1 | 29.1 | 36.4 | 36.5 | 27.8 | 23.0 | 11.9 | 8.4 |
| Average daytime temperature (°C) | -2.2 | 0.7 | 5.0 | 13.4 | 22.8 | 23.7 | 30.5 | 28.3 | 21.4 | 13.6 | 5.3 | 2.7 |
| Average temperature (°C) | -5.5 | -4.0 | -1.0 | 6.1 | 15.2 | 17.2 | 22.6 | 20.9 | 15.0 | 7.9 | 0.4 | -1.2 |
| Average night temperature (°C) | -8.7 | -7.9 | -5.2 | 0.6 | 8.9 | 11.6 | 15.2 | 14.7 | 9.5 | 3.2 | -3.6 | -4.3 |
| Absolute minimum temperature (°C) | -27.3 | -20.9 | -10.0 | -5.4 | 3.8 | 4.1 | 10.3 | 8.1 | 5.1 | -8.5 | -10.4 | -10.7 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 |
| Daylight mean duration (h) | 8.9 | 10.3 | 11.9 | 13.6 | 15.1 | 15.9 | 15.5 | 14.2 | 12.6 | 10.9 | 9.3 | 8.5 |
| 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) | 4.8 | 6.1 | 8.2 | 9.3 | 11.9 | 12.3 | 14.0 | 10.8 | 9.5 | 7.8 | 5.8 | 4.2 |
| Precipitation (mm) | 32 | 22 | 32 | 28 | 51 | 25 | 0 | 38 | 15 | 27 | 34 | 12 |
| Sunny days | 18 | 15 | 14 | 16 | 17 | 17 | 31 | 23 | 20 | 17 | 14 | 21 |
| Rainy days | 4 | 7 | 6 | 13 | 14 | 13 | 0 | 8 | 10 | 12 | 16 | 8 |
| Snow days | 9 | 6 | 11 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 |
The best time to visit Flathead Reservation during the most sunny months:
Months with the longest average daylight duration in Flathead Reservation:
The largest precipitation sum in Flathead Reservation is at