Newell, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 32.9 °F (low) to 59.5 °F (high). Annual precipitation averages 16.7 Inches. Newell 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 | 9.9 °F | 33.6 °F | 0.35 in. |
| February | 12.8 °F | 36.8 °F | 0.46 in. |
| March | 22.2 °F | 47.6 °F | 0.87 in. |
| April | 31.1 °F | 58.1 °F | 2.01 in. |
| May | 41.9 °F | 67.3 °F | 3.1 in. |
| June | 52.0 °F | 78.4 °F | 3.0 in. |
| July | 58.5 °F | 86.8 °F | 2.05 in. |
| August | 56.0 °F | 86.1 °F | 1.4 in. |
| September | 45.7 °F | 76.4 °F | 1.07 in. |
| October | 32.6 °F | 61.3 °F | 1.39 in. |
| November | 20.8 °F | 46.5 °F | 0.54 in. |
| December | 11.7 °F | 35.6 °F | 0.5 in. |
| Annual | 32.9 °F | 59.5 °F | 16.74 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 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |