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Weather & Climate
Blaine County, Montana, United States
Overview
Climate data and monthly weather averages for Blaine County.
Key Metrics
Annual Avg
7.2°C
Summer Avg
20.3°C
Winter Avg
-5.3°C
Record High
40.6°C
Record Low
-33.6°C
Annual Precipitation
413.5 mm
Avg Humidity
63%
Summer Humidity
50%
Winter Humidity
78%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 13.6° | -5.7° | -33.3° | 15.8 | 80% | 47 | 69.8 |
| Feb | 17.4° | -5.2° | -31.8° | 14.6 | 75% | 72 | 67.3 |
| Mar | 25.2° | 0.8° | -33.6° | 19.2 | 66% | 118 | 64.8 |
| Apr | 30.4° | 6.5° | -13.9° | 36.6 | 58% | 147 | 62.9 |
| May | 33.2° | 12.4° | -5.2° | 69.4 | 56% | 183 | 66.8 |
| Jun | 36.9° | 17.4° | 1.4° | 74.7 | 56% | 198 | 62.2 |
| Jul | 39.2° | 22.6° | 8.5° | 40 | 47% | 218 | 55.9 |
| Aug | 40.6° | 20.8° | 4.5° | 40 | 48% | 179 | 50.6 |
| Sep | 35° | 14.6° | -5.9° | 36.9 | 55% | 125 | 51.5 |
| Oct | 31.7° | 6.6° | -14.1° | 30.7 | 64% | 83 | 63.1 |
| Nov | 20.7° | 0.2° | -21.9° | 20.1 | 72% | 47 | 61.4 |
| Dec | 10.6° | -5° | -31.5° | 15.5 | 79% | 36 | 64 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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