Overton, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.8 °F (low) to 63.1 °F (high). Annual precipitation averages 24.7 Inches. Overton 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.6 °F | 37.1 °F | 0.41 in. |
| February | 17.3 °F | 41.2 °F | 0.73 in. |
| March | 26.1 °F | 52.4 °F | 1.31 in. |
| April | 35.9 °F | 62.5 °F | 2.59 in. |
| May | 47.3 °F | 72.2 °F | 3.9 in. |
| June | 58.3 °F | 83.0 °F | 3.74 in. |
| July | 62.9 °F | 87.3 °F | 3.53 in. |
| August | 60.6 °F | 84.8 °F | 3.18 in. |
| September | 51.1 °F | 78.8 °F | 1.87 in. |
| October | 37.9 °F | 66.3 °F | 1.83 in. |
| November | 25.1 °F | 51.6 °F | 0.89 in. |
| December | 16.5 °F | 39.8 °F | 0.67 in. |
| Annual | 37.8 °F | 63.1 °F | 24.65 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |