Chamberlain, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.3 °C (low) to 15.6 °C (high). Annual precipitation averages 566.2 Millimeters. Chamberlain is located in USDA Plant Hardiness Zone 5a. 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 | -12.7 °C | -0.9 °C | 13.72 mm |
| February | -10.7 °C | 1.8 °C | 15.75 mm |
| March | -5.3 °C | 8.4 °C | 24.38 mm |
| April | 1.1 °C | 15.6 °C | 66.29 mm |
| May | 8.2 °C | 21.7 °C | 85.6 mm |
| June | 14.2 °C | 27.6 °C | 96.77 mm |
| July | 17.3 °C | 31.4 °C | 67.31 mm |
| August | 15.9 °C | 30.1 °C | 59.44 mm |
| September | 10.8 °C | 25.3 °C | 57.4 mm |
| October | 3.1 °C | 17.6 °C | 44.7 mm |
| November | -4.4 °C | 8.1 °C | 19.81 mm |
| December | -10 °C | 0.8 °C | 14.99 mm |
| Annual | 2.3 °C | 15.6 °C | 566.16 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |