US Geography / US Weather / South Dakota Weather / Spearfish |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 35 | 38 | 44 | 56 | 66 | 76 | 85 | 84 | 72 | 61 | 46 | 37 |
| Avg. Low | 12 | 16 | 22 | 32 | 42 | 51 | 57 | 55 | 45 | 35 | 24 | 15 |
| Mean | 24 | 27 | 34 | 45 | 55 | 64 | 72 | 70 | 58 | 48 | 35 | 26 |
| Avg. Precip. | 0.6 in | 0.7 in | 1.5 in | 2.7 in | 3.8 in | 4.1 in | 2.0 in | 1.8 in | 1.7 in | 1.7 in | 0.9 in | 0.8 in |
Degrees in Fahrenheit
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