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Weather & Climate
Gregory County, South Dakota, United States
Overview
Climate data and monthly weather averages for Gregory County.
Key Metrics
Annual Avg
9.7°C
Summer Avg
23.6°C
Winter Avg
-3.7°C
Record High
45.5°C
Record Low
-26.6°C
Annual Precipitation
592.3 mm
Avg Humidity
65%
Summer Humidity
59%
Winter Humidity
74%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 17.1° | -4.3° | -26.6° | 10.8 | 75% | 62 | 67.5 |
| Feb | 23.2° | -3.5° | -22.3° | 14.8 | 71% | 83 | 66.8 |
| Mar | 29.5° | 2.8° | -24.6° | 29.4 | 66% | 122 | 67 |
| Apr | 32.9° | 8.7° | -14.4° | 69.3 | 63% | 150 | 68.6 |
| May | 37.1° | 15.1° | -3.6° | 91.8 | 62% | 183 | 61.1 |
| Jun | 40.7° | 21.6° | 5.3° | 97.5 | 62% | 200 | 52.4 |
| Jul | 45.5° | 25.6° | 9.8° | 68.8 | 56% | 213 | 45.3 |
| Aug | 43.7° | 23.5° | 9.4° | 77.5 | 60% | 179 | 51.4 |
| Sep | 40.9° | 18.6° | 1.4° | 57 | 58% | 138 | 57.7 |
| Oct | 32.8° | 9.4° | -12.3° | 43.4 | 64% | 97 | 69.8 |
| Nov | 25.5° | 2.7° | -16.9° | 15.9 | 68% | 64 | 64.4 |
| Dec | 19.1° | -3.4° | -24.1° | 16.1 | 76% | 51 | 64.2 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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