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Weather & Climate
Sweet Grass County, Montana, United States
Overview
Available climate summaries for Sweet Grass County. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
4.6°C
Summer Avg
16.7°C
Winter Avg
-6.3°C
Record High
37.6°C
Record Low
-33.8°C
Annual Precipitation
607.8 mm
Avg Humidity
69%
Summer Humidity
58%
Winter Humidity
82%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 10.2° | -6.2° | -33.8° | 28.8 | 84% | 57 | 56.6 |
| Feb | 10.9° | -6.4° | -30° | 34.4 | 82% | 79 | 59.6 |
| Mar | 19.9° | -1.1° | -32.4° | 42.5 | 73% | 118 | 56.4 |
| Apr | 24.6° | 2.8° | -14.7° | 69.6 | 69% | 141 | 53.8 |
| May | 30.2° | 8.1° | -9.2° | 96.7 | 67% | 176 | 58.9 |
| Jun | 33.5° | 13.6° | -2.8° | 85.2 | 63% | 202 | 58.4 |
| Jul | 37.6° | 19° | 3.2° | 41.9 | 56% | 220 | 42.7 |
| Aug | 34.6° | 17.4° | 0.8° | 40 | 54% | 185 | 51 |
| Sep | 31.1° | 11.8° | -7.4° | 46.8 | 59% | 137 | 47.1 |
| Oct | 27.1° | 4.1° | -22.8° | 53 | 68% | 91 | 53.4 |
| Nov | 18.2° | -1.6° | -30.2° | 36 | 74% | 57 | 60.1 |
| Dec | 9.9° | -6.4° | -31.3° | 32.9 | 81% | 43 | 56.1 |
Data sources
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-22.
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