Howells, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.2 °F (low) to 60.3 °F (high). Annual precipitation averages 28.9 Inches. Howells is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.9 °F | 31.5 °F | 0.57 in. |
| February | 15.7 °F | 35.9 °F | 0.76 in. |
| March | 25.9 °F | 48.8 °F | 1.49 in. |
| April | 36.9 °F | 61.1 °F | 3.14 in. |
| May | 49.0 °F | 71.9 °F | 4.47 in. |
| June | 60.0 °F | 81.9 °F | 4.68 in. |
| July | 64.1 °F | 85.5 °F | 3.27 in. |
| August | 61.5 °F | 83.1 °F | 3.52 in. |
| September | 52.1 °F | 76.7 °F | 2.74 in. |
| October | 39.0 °F | 63.8 °F | 2.24 in. |
| November | 25.9 °F | 48.3 °F | 1.17 in. |
| December | 16.1 °F | 35.3 °F | 0.83 in. |
| Annual | 38.2 °F | 60.3 °F | 28.88 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |