Deweese, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.6 °F (low) to 63.4 °F (high). Annual precipitation averages 27.5 Inches. Deweese is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.0 °F | 36.3 °F | 0.59 in. |
| February | 18.4 °F | 40.5 °F | 0.72 in. |
| March | 27.5 °F | 52.8 °F | 1.45 in. |
| April | 37.9 °F | 63.4 °F | 2.51 in. |
| May | 49.5 °F | 73.2 °F | 4.56 in. |
| June | 60.5 °F | 83.9 °F | 3.9 in. |
| July | 64.9 °F | 88.0 °F | 4.08 in. |
| August | 62.6 °F | 85.8 °F | 3.47 in. |
| September | 53.0 °F | 79.4 °F | 2.1 in. |
| October | 40.2 °F | 66.8 °F | 2.09 in. |
| November | 27.5 °F | 51.7 °F | 1.18 in. |
| December | 18.3 °F | 39.3 °F | 0.82 in. |
| Annual | 39.6 °F | 63.4 °F | 27.47 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |