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Weather & Climate
Fall River County, South Dakota, United States
Overview
Climate data and monthly weather averages for Fall River County.
Key Metrics
Annual Avg
10°C
Summer Avg
23.2°C
Winter Avg
-1.9°C
Record High
42.8°C
Record Low
-22.7°C
Annual Precipitation
414.7 mm
Avg Humidity
57%
Summer Humidity
49%
Winter Humidity
65%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 19.8° | -1.9° | -21.9° | 6.8 | 66% | 65 | 63 |
| Feb | 22.2° | -1.6° | -22.7° | 12 | 63% | 83 | 68.5 |
| Mar | 27.7° | 3.9° | -21.1° | 25.4 | 58% | 127 | 68.9 |
| Apr | 31.8° | 8.4° | -11.5° | 50.7 | 56% | 153 | 70.7 |
| May | 36.7° | 14° | -5.7° | 75.6 | 55% | 187 | 61.5 |
| Jun | 42.2° | 20.8° | 2.5° | 66.6 | 51% | 210 | 59.6 |
| Jul | 42.8° | 25.4° | 8.3° | 49.9 | 48% | 219 | 47.1 |
| Aug | 41.1° | 23.4° | 5.3° | 40.3 | 48% | 189 | 52.9 |
| Sep | 39.9° | 17.8° | -1.7° | 36.6 | 50% | 145 | 53.4 |
| Oct | 32.3° | 9° | -16° | 30.1 | 58% | 101 | 59.7 |
| Nov | 26° | 2.9° | -17.5° | 11.1 | 60% | 68 | 67 |
| Dec | 19.4° | -2.1° | -22.6° | 9.6 | 66% | 54 | 61 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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