Unlock deeper multi-jurisdiction research
Full sub-pages, saves, and alerts are available on paid plans.
Weather & Climate
Sidney, Montana, United States
Overview
Climate data and monthly weather averages for Sidney.
Key Metrics
Annual Avg
7.4°C
Summer Avg
21.4°C
Winter Avg
-6.3°C
Record High
43°C
Record Low
-31.9°C
Annual Precipitation
406.2 mm
Avg Humidity
64%
Summer Humidity
52%
Winter Humidity
80%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 13.8° | -7° | -31.9° | 11.2 | 82% | 52 | 64.6 |
| Feb | 18.9° | -6.2° | -31.1° | 10.9 | 76% | 76 | 79.2 |
| Mar | 26.9° | 0.6° | -28.6° | 18.3 | 66% | 119 | 68.5 |
| Apr | 31.5° | 6.6° | -16.3° | 35.7 | 59% | 147 | 64.1 |
| May | 34.6° | 13.1° | -4.9° | 74.4 | 56% | 183 | 66.3 |
| Jun | 41.2° | 19° | 2.7° | 70.2 | 56% | 200 | 58.5 |
| Jul | 43° | 23.6° | 8.7° | 51.8 | 50% | 218 | 66.3 |
| Aug | 42° | 21.7° | 5.7° | 39.1 | 51% | 180 | 61.8 |
| Sep | 37.8° | 15.6° | -2.6° | 41.7 | 56% | 127 | 54.5 |
| Oct | 31.7° | 6.9° | -14.7° | 26.7 | 64% | 85 | 64.5 |
| Nov | 22.4° | 0.2° | -22.5° | 12.6 | 72% | 51 | 67.1 |
| Dec | 13.8° | -5.7° | -31.9° | 13.6 | 81% | 38 | 59.8 |
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.