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Weather & Climate
Valley County, Montana, United States
Overview
Climate data and monthly weather averages for Valley County.
Key Metrics
Annual Avg
6.8°C
Summer Avg
20.7°C
Winter Avg
-6.8°C
Record High
40.5°C
Record Low
-36°C
Annual Precipitation
399.5 mm
Avg Humidity
64%
Summer Humidity
51%
Winter Humidity
81%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 11.8° | -7.5° | -36° | 14.6 | 84% | 47 | 66.5 |
| Feb | 18.3° | -6.6° | -31.1° | 12.3 | 77% | 72 | 70.8 |
| Mar | 23.2° | 0.2° | -34.1° | 16.4 | 66% | 117 | 64 |
| Apr | 30.9° | 6.5° | -16.1° | 32.1 | 57% | 147 | 60.4 |
| May | 33.4° | 12.8° | -5.8° | 69.4 | 55% | 185 | 65.6 |
| Jun | 38.1° | 18.1° | 2.1° | 73.8 | 55% | 196 | 55 |
| Jul | 40.5° | 23° | 8.4° | 45.3 | 48% | 215 | 50.8 |
| Aug | 40.1° | 21.1° | 4.2° | 40 | 49% | 178 | 51.7 |
| Sep | 35.8° | 14.8° | -2.4° | 35.7 | 56% | 125 | 50 |
| Oct | 30.6° | 6.3° | -16.2° | 29.4 | 65% | 83 | 64 |
| Nov | 20.7° | -0.6° | -24.5° | 15.9 | 74% | 48 | 61.8 |
| Dec | 11.5° | -6.3° | -33.3° | 14.6 | 82% | 35 | 59.9 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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