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Weather & Climate
Chester, Montana, United States
Overview
Climate data and monthly weather averages for Chester.
Key Metrics
Annual Avg
6.9°C
Summer Avg
19.8°C
Winter Avg
-5.1°C
Record High
40.6°C
Record Low
-32.7°C
Annual Precipitation
349.6 mm
Avg Humidity
63%
Summer Humidity
49%
Winter Humidity
79%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 11.9° | -5.5° | -32.7° | 14.9 | 81% | 41 | 66.5 |
| Feb | 15.2° | -4.7° | -29.3° | 13.7 | 76% | 64 | 66.6 |
| Mar | 25.8° | 0.6° | -32.4° | 17.4 | 68% | 108 | 66.6 |
| Apr | 29.2° | 6° | -13° | 35.1 | 60% | 146 | 63.9 |
| May | 32.9° | 12° | -5.5° | 57 | 56% | 182 | 66 |
| Jun | 37.1° | 16.9° | 0.9° | 69.3 | 55% | 199 | 58.2 |
| Jul | 40.6° | 22.1° | 6.9° | 24.2 | 45% | 221 | 51.1 |
| Aug | 38.9° | 20.3° | 4° | 28.5 | 47% | 180 | 53.7 |
| Sep | 34.6° | 14.2° | -8.1° | 33.6 | 55% | 126 | 55.4 |
| Oct | 28.2° | 6.4° | -13.5° | 24.2 | 64% | 82 | 62.7 |
| Nov | 19.9° | 0° | -25.6° | 16.5 | 73% | 45 | 66.5 |
| Dec | 9.8° | -5.2° | -31.6° | 15.2 | 80% | 31 | 64.3 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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