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Weather & Climate
Beaverhead County, Montana, United States
Overview
Climate data and monthly weather averages for Beaverhead County.
Key Metrics
Annual Avg
2°C
Summer Avg
14.5°C
Winter Avg
-10.1°C
Record High
35°C
Record Low
-33.9°C
Annual Precipitation
518.2 mm
Avg Humidity
72%
Summer Humidity
55%
Winter Humidity
93%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 3.8° | -10.4° | -33.9° | 38.8 | 94% | 54 | 38.2 |
| Feb | 6.6° | -9.6° | -33.4° | 38.4 | 93% | 77 | 39.3 |
| Mar | 15° | -4.3° | -28° | 43.4 | 83% | 123 | 39.5 |
| Apr | 21.4° | 0.5° | -19.6° | 53.7 | 70% | 152 | 41.1 |
| May | 27.6° | 6° | -11.8° | 64.5 | 66% | 184 | 36.6 |
| Jun | 30.4° | 11.1° | -4.7° | 62.4 | 62% | 203 | 36.5 |
| Jul | 35° | 16.9° | -0.5° | 28.2 | 52% | 225 | 34.5 |
| Aug | 32.4° | 15.5° | -1.8° | 30.1 | 50% | 192 | 31.8 |
| Sep | 30.3° | 10.1° | -7.5° | 37.2 | 54% | 140 | 36.3 |
| Oct | 23.8° | 2.3° | -19.5° | 39.1 | 67% | 93 | 36.5 |
| Nov | 15.4° | -4.3° | -31.6° | 38.7 | 79% | 55 | 37 |
| Dec | 5.1° | -10.2° | -32.9° | 43.7 | 91% | 42 | 39.5 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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