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Weather & Climate
Powder River County, Montana, United States
Overview
Climate data and monthly weather averages for Powder River County.
Key Metrics
Annual Avg
9°C
Summer Avg
22.2°C
Winter Avg
-3.1°C
Record High
43.2°C
Record Low
-28.4°C
Annual Precipitation
399.3 mm
Avg Humidity
58%
Summer Humidity
48%
Winter Humidity
70%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 19.1° | -3.1° | -26° | 10.5 | 71% | 58 | 59.4 |
| Feb | 21.2° | -3° | -24.9° | 15.4 | 67% | 80 | 74.7 |
| Mar | 28.1° | 2.7° | -28.4° | 22.6 | 61% | 120 | 64.3 |
| Apr | 31.2° | 7.4° | -12.4° | 43.2 | 58% | 148 | 60.7 |
| May | 36° | 13.2° | -4.9° | 84.6 | 56% | 184 | 67.8 |
| Jun | 41.7° | 19.4° | 0.5° | 62.4 | 52% | 208 | 54.7 |
| Jul | 43.2° | 24.6° | 8.3° | 38.4 | 46% | 225 | 53 |
| Aug | 41.2° | 22.7° | 4.9° | 34.1 | 46% | 189 | 68.9 |
| Sep | 37.5° | 16.7° | -1.7° | 33.9 | 50% | 137 | 56.7 |
| Oct | 33.2° | 8.1° | -14.9° | 31.6 | 59% | 92 | 61.7 |
| Nov | 24.9° | 2° | -20.2° | 11.4 | 63% | 59 | 64.2 |
| Dec | 17.5° | -3.1° | -25.9° | 11.2 | 71% | 45 | 60.7 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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