Hartington, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.8 °C (low) to 15.2 °C (high). Annual precipitation averages 718.3 Millimeters. Hartington 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 °C | -1.1 °C | 15.24 mm |
| February | -9.7 °C | 1.6 °C | 19.56 mm |
| March | -4.2 °C | 8.2 °C | 36.83 mm |
| April | 2.1 °C | 15.2 °C | 78.99 mm |
| May | 8.8 °C | 21.8 °C | 101.09 mm |
| June | 14.9 °C | 27.1 °C | 111.76 mm |
| July | 17.2 °C | 29.6 °C | 75.69 mm |
| August | 15.9 °C | 28.3 °C | 84.07 mm |
| September | 10.7 °C | 24.8 °C | 74.42 mm |
| October | 3.6 °C | 17.5 °C | 65.28 mm |
| November | -3.8 °C | 8.4 °C | 33.53 mm |
| December | -9.7 °C | 1 °C | 21.84 mm |
| Annual | 2.8 °C | 15.2 °C | 718.3 mm |
| 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 : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |