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Weather & Climate
Flathead County, Montana, United States
Overview
Climate data and monthly weather averages for Flathead County.
Key Metrics
Annual Avg
1.4°C
Summer Avg
13.4°C
Winter Avg
-9.6°C
Record High
33.6°C
Record Low
-40°C
Annual Precipitation
1029.3 mm
Avg Humidity
82%
Summer Humidity
67%
Winter Humidity
95%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 1.3° | -9.3° | -35.4° | 111 | 95% | 33 | 31.7 |
| Feb | 3.6° | -9.5° | -39.4° | 89.6 | 95% | 57 | 30.5 |
| Mar | 7.8° | -5.3° | -38.1° | 104.2 | 95% | 96 | 27.7 |
| Apr | 19.1° | -1° | -24.6° | 84.6 | 90% | 132 | 28.8 |
| May | 23.9° | 5.7° | -9.7° | 92.1 | 78% | 171 | 31.1 |
| Jun | 28.6° | 10.2° | -4.9° | 113.7 | 76% | 179 | 23.7 |
| Jul | 32.5° | 15.1° | 1.1° | 33.5 | 66% | 219 | 22.6 |
| Aug | 33.6° | 14.8° | 0° | 38.8 | 60% | 179 | 20 |
| Sep | 29.9° | 9.5° | -10.8° | 57.3 | 65% | 121 | 24 |
| Oct | 23.3° | 1.8° | -19.2° | 85.6 | 80% | 73 | 29.6 |
| Nov | 12.2° | -4.9° | -33° | 110.4 | 94% | 35 | 32.2 |
| Dec | 2.8° | -9.9° | -40° | 108.5 | 95% | 25 | 31 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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