Imperial, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.4 °C (low) to 18 °C (high). Annual precipitation averages 479.3 Millimeters. Imperial 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 | -9.4 °C | 5.1 °C | 9.65 mm |
| February | -8.3 °C | 6.5 °C | 13.97 mm |
| March | -3.7 °C | 12.3 °C | 26.16 mm |
| April | 1.1 °C | 16.9 °C | 49.02 mm |
| May | 7.3 °C | 22.2 °C | 72.9 mm |
| June | 13.3 °C | 28.7 °C | 77.72 mm |
| July | 16.2 °C | 31.9 °C | 73.91 mm |
| August | 14.9 °C | 30.7 °C | 62.99 mm |
| September | 9.5 °C | 26.5 °C | 32.77 mm |
| October | 1.9 °C | 18.8 °C | 37.59 mm |
| November | -4.7 °C | 11.4 °C | 14.22 mm |
| December | -8.8 °C | 5.5 °C | 8.38 mm |
| Annual | 2.4 °C | 18 °C | 479.28 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |