Grant, 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 17.9 °C (high). Annual precipitation averages 506.7 Millimeters. Grant is located in USDA Plant Hardiness Zone 5b. 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 | -9.4 °C | 4.8 °C | 8.89 mm |
| February | -8.2 °C | 6.2 °C | 13.46 mm |
| March | -3.7 °C | 11.9 °C | 25.15 mm |
| April | 0.9 °C | 16.3 °C | 54.1 mm |
| May | 7.1 °C | 22.1 °C | 79.76 mm |
| June | 13.2 °C | 28.6 °C | 82.04 mm |
| July | 16.1 °C | 31.8 °C | 81.79 mm |
| August | 14.8 °C | 30.7 °C | 61.98 mm |
| September | 9.4 °C | 26.6 °C | 38.1 mm |
| October | 1.9 °C | 18.7 °C | 38.61 mm |
| November | -4.6 °C | 11.3 °C | 13.21 mm |
| December | -8.8 °C | 5.4 °C | 9.65 mm |
| Annual | 2.4 °C | 17.9 °C | 506.74 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |