Wolsey, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1 °C (low) to 13.7 °C (high). Annual precipitation averages 601 Millimeters. Wolsey is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.9 °C | -4.1 °C | 17.78 mm |
| February | -12.7 °C | -1.1 °C | 19.05 mm |
| March | -6.2 °C | 5.8 °C | 24.89 mm |
| April | 0.3 °C | 13.9 °C | 67.82 mm |
| May | 7.4 °C | 20.7 °C | 84.33 mm |
| June | 13.6 °C | 26.3 °C | 96.52 mm |
| July | 16.2 °C | 29.5 °C | 72.9 mm |
| August | 14.8 °C | 28.4 °C | 69.09 mm |
| September | 9.6 °C | 24.1 °C | 58.17 mm |
| October | 1.8 °C | 15.7 °C | 50.55 mm |
| November | -5.7 °C | 6.4 °C | 21.08 mm |
| December | -11.9 °C | -1.3 °C | 18.8 mm |
| Annual | 1 °C | 13.7 °C | 600.98 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |