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Weather & Climate
Spearfish, South Dakota, United States
Overview
Available climate summaries for Spearfish. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
8°C
Summer Avg
21°C
Winter Avg
-3.7°C
Record High
42.6°C
Record Low
-25.9°C
Annual Precipitation
487.1 mm
Avg Humidity
61%
Summer Humidity
53%
Winter Humidity
71%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 19.1° | -3.5° | -25.4° | 13 | 71% | 59 | 46.8 |
| Feb | 20.6° | -3.9° | -25.2° | 18.5 | 70% | 81 | 52.8 |
| Mar | 26.8° | 1.8° | -25.9° | 28.2 | 63% | 123 | 48.7 |
| Apr | 29.3° | 6.2° | -13.7° | 52.8 | 61% | 149 | 51.4 |
| May | 34.6° | 11.8° | -7.8° | 89.9 | 60% | 183 | 42.5 |
| Jun | 41.3° | 18.4° | 0.9° | 73.2 | 56% | 205 | 38.5 |
| Jul | 42.6° | 23.2° | 7° | 58 | 51% | 217 | 34.9 |
| Aug | 39.4° | 21.4° | 4.4° | 47.1 | 52% | 187 | 46 |
| Sep | 37.7° | 15.9° | -3.2° | 38.7 | 53% | 140 | 41.7 |
| Oct | 32.1° | 7.2° | -20.1° | 38.1 | 62% | 96 | 45 |
| Nov | 24.2° | 1.6° | -18.5° | 14.4 | 64% | 63 | 52.7 |
| Dec | 18.1° | -3.6° | -25.9° | 15.2 | 72% | 49 | 44.8 |
Data sources
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-22.
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