Hartington, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.1 °F (low) to 59.4 °F (high). Annual precipitation averages 28.3 Inches. 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 | 10.6 °F | 30.1 °F | 0.6 in. |
| February | 14.5 °F | 34.9 °F | 0.77 in. |
| March | 24.4 °F | 46.8 °F | 1.45 in. |
| April | 35.7 °F | 59.4 °F | 3.11 in. |
| May | 47.8 °F | 71.2 °F | 3.98 in. |
| June | 58.9 °F | 80.8 °F | 4.4 in. |
| July | 63.0 °F | 85.2 °F | 2.98 in. |
| August | 60.7 °F | 83.0 °F | 3.31 in. |
| September | 51.3 °F | 76.6 °F | 2.93 in. |
| October | 38.4 °F | 63.5 °F | 2.57 in. |
| November | 25.1 °F | 47.1 °F | 1.32 in. |
| December | 14.6 °F | 33.8 °F | 0.86 in. |
| Annual | 37.1 °F | 59.4 °F | 28.28 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 | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |