Unlock deeper multi-jurisdiction research
Full sub-pages, saves, and alerts are available on paid plans.
Weather & Climate
Fallon County, Montana, United States
Overview
Climate data and monthly weather averages for Fallon County.
Key Metrics
Annual Avg
7.7°C
Summer Avg
21.5°C
Winter Avg
-5.2°C
Record High
42.3°C
Record Low
-30.1°C
Annual Precipitation
412.8 mm
Avg Humidity
62%
Summer Humidity
51%
Winter Humidity
76%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 13.7° | -5.5° | -28.3° | 10.5 | 78% | 53 | 66.2 |
| Feb | 19.4° | -5.1° | -27.6° | 11.2 | 73% | 77 | 77.4 |
| Mar | 26.8° | 1.1° | -26.8° | 21.1 | 65% | 120 | 67.8 |
| Apr | 31.2° | 6.4° | -17.1° | 39.3 | 59% | 149 | 62.9 |
| May | 35.4° | 12.7° | -5.6° | 78.1 | 58% | 183 | 76.1 |
| Jun | 41.8° | 18.8° | 0.5° | 69.6 | 56% | 204 | 59.7 |
| Jul | 42.3° | 23.8° | 8° | 48.4 | 49% | 222 | 58.9 |
| Aug | 41.7° | 22° | 5.5° | 40 | 49% | 185 | 62.4 |
| Sep | 37.3° | 15.9° | -1.9° | 43.2 | 53% | 132 | 57.7 |
| Oct | 32.9° | 7.1° | -15.5° | 28.5 | 62% | 89 | 62.7 |
| Nov | 23.3° | 0.7° | -21.1° | 11.4 | 69% | 56 | 68.4 |
| Dec | 15.2° | -4.9° | -30.1° | 11.5 | 77% | 41 | 60 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
Subscribe to unlock the full sub-page depth for additional jurisdictions.
You can keep discovering Oyster publicly, but full multi-jurisdiction depth, tracking, alerts, and exports are part of paid access.