Dunning, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.8 °C (low) to 16.5 °C (high). Annual precipitation averages 618.5 Millimeters. Dunning is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.9 °C | 2.4 °C | 12.7 mm |
| February | -9.3 °C | 4.1 °C | 18.8 mm |
| March | -4.4 °C | 10.1 °C | 32.26 mm |
| April | 0.8 °C | 15.3 °C | 70.61 mm |
| May | 6.9 °C | 21.2 °C | 101.85 mm |
| June | 12.9 °C | 27.2 °C | 98.04 mm |
| July | 15.9 °C | 30.7 °C | 77.72 mm |
| August | 14.5 °C | 29.7 °C | 72.9 mm |
| September | 8.9 °C | 25.4 °C | 51.82 mm |
| October | 1.3 °C | 17.9 °C | 47.24 mm |
| November | -5.2 °C | 9.9 °C | 20.32 mm |
| December | -9.9 °C | 3.7 °C | 14.22 mm |
| Annual | 1.8 °C | 16.5 °C | 618.48 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |