Chamberlain, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.2 °F (low) to 60.1 °F (high). Annual precipitation averages 22.3 Inches. 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 | 9.2 °F | 30.3 °F | 0.54 in. |
| February | 12.8 °F | 35.2 °F | 0.62 in. |
| March | 22.5 °F | 47.1 °F | 0.96 in. |
| April | 34.0 °F | 60.0 °F | 2.61 in. |
| May | 46.8 °F | 71.1 °F | 3.37 in. |
| June | 57.6 °F | 81.7 °F | 3.81 in. |
| July | 63.2 °F | 88.5 °F | 2.65 in. |
| August | 60.7 °F | 86.1 °F | 2.34 in. |
| September | 51.4 °F | 77.6 °F | 2.26 in. |
| October | 37.6 °F | 63.6 °F | 1.76 in. |
| November | 24.1 °F | 46.5 °F | 0.78 in. |
| December | 14.0 °F | 33.5 °F | 0.59 in. |
| Annual | 36.2 °F | 60.1 °F | 22.29 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |