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Weather & Climate
Grant County, South Dakota, United States
Overview
Climate data and monthly weather averages for Grant County.
Key Metrics
Annual Avg
6.9°C
Summer Avg
21.4°C
Winter Avg
-8.4°C
Record High
41.1°C
Record Low
-41.1°C
Annual Precipitation
627.8 mm
Avg Humidity
72%
Summer Humidity
65%
Winter Humidity
85%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 8.9° | -9.8° | -41.1° | 12.4 | 87% | 59 | 58.7 |
| Feb | 17.2° | -8.3° | -31.6° | 16.8 | 82% | 85 | 70.2 |
| Mar | 26.6° | -0.5° | -29.6° | 31 | 74% | 120 | 62.4 |
| Apr | 31.3° | 6.7° | -14.9° | 58.5 | 67% | 147 | 59.4 |
| May | 35.1° | 13.6° | -5.3° | 81.2 | 65% | 173 | 59.7 |
| Jun | 38.2° | 19.8° | 4.5° | 101.4 | 67% | 189 | 50.6 |
| Jul | 41.1° | 23.2° | 7.7° | 80.6 | 63% | 204 | 47.7 |
| Aug | 38.9° | 21.2° | 5.5° | 77.5 | 64% | 171 | 52.2 |
| Sep | 35.3° | 16.4° | -0.5° | 73.2 | 66% | 126 | 56.8 |
| Oct | 30° | 7.4° | -15.1° | 56.7 | 70% | 85 | 66.9 |
| Nov | 22° | 0.1° | -20.8° | 18 | 76% | 54 | 63.2 |
| Dec | 11.2° | -7° | -30° | 20.5 | 86% | 40 | 67.9 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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