Norris, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.5 °F (low) to 60.9 °F (high). Annual precipitation averages 20.5 Inches. Norris 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 | 12.5 °F | 34.9 °F | 0.47 in. |
| February | 15.0 °F | 38.5 °F | 0.63 in. |
| March | 23.5 °F | 48.8 °F | 1.12 in. |
| April | 33.0 °F | 58.8 °F | 2.36 in. |
| May | 43.8 °F | 69.1 °F | 3.48 in. |
| June | 54.6 °F | 79.8 °F | 3.45 in. |
| July | 60.7 °F | 88.0 °F | 2.55 in. |
| August | 58.7 °F | 87.0 °F | 2.01 in. |
| September | 49.0 °F | 78.4 °F | 1.51 in. |
| October | 35.9 °F | 62.6 °F | 1.71 in. |
| November | 24.0 °F | 48.1 °F | 0.64 in. |
| December | 15.3 °F | 37.0 °F | 0.53 in. |
| Annual | 35.5 °F | 60.9 °F | 20.46 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 |