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Weather & Climate
Roundup, Montana, United States
Overview
Climate data and monthly weather averages for Roundup.
Key Metrics
Annual Avg
7.8°C
Summer Avg
20.6°C
Winter Avg
-3.8°C
Record High
42.4°C
Record Low
-34.9°C
Annual Precipitation
444.1 mm
Avg Humidity
61%
Summer Humidity
49%
Winter Humidity
73%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 16° | -3.9° | -33.2° | 15.5 | 75% | 51 | 61.7 |
| Feb | 16.6° | -3.6° | -30.8° | 17.4 | 71% | 74 | 63.3 |
| Mar | 24.4° | 1.8° | -34.9° | 23.9 | 64% | 116 | 59 |
| Apr | 30.1° | 6.3° | -13.6° | 48.3 | 60% | 143 | 71 |
| May | 32.6° | 11.8° | -5.5° | 79.7 | 58% | 179 | 66.2 |
| Jun | 37.6° | 17.3° | 0.1° | 72.9 | 57% | 200 | 54.2 |
| Jul | 42.4° | 23.1° | 5.8° | 36 | 46% | 220 | 49.7 |
| Aug | 39.1° | 21.5° | 4.3° | 39.7 | 44% | 184 | 60.3 |
| Sep | 36.6° | 15.3° | -5.9° | 37.5 | 51% | 131 | 50.3 |
| Oct | 32.4° | 7.1° | -17.9° | 38.4 | 61% | 88 | 57.1 |
| Nov | 22.4° | 1.1° | -25.7° | 17.4 | 67% | 54 | 61.2 |
| Dec | 14.1° | -3.9° | -29.5° | 17.4 | 74% | 39 | 60.6 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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