Grand Island, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.1 °C (low) to 16.8 °C (high). Annual precipitation averages 696.5 Millimeters. Grand Island 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.5 °C | 1.8 °C | 15.24 mm |
| February | -7.7 °C | 3.9 °C | 18.54 mm |
| March | -2.5 °C | 10.7 °C | 36.83 mm |
| April | 3.2 °C | 16.7 °C | 71.37 mm |
| May | 9.7 °C | 22.3 °C | 116.59 mm |
| June | 15.7 °C | 28.2 °C | 103.89 mm |
| July | 18.2 °C | 30.4 °C | 86.11 mm |
| August | 16.9 °C | 29.2 °C | 83.57 mm |
| September | 11.7 °C | 25.7 °C | 56.39 mm |
| October | 4.3 °C | 18.6 °C | 54.61 mm |
| November | -2.6 °C | 10.5 °C | 30.99 mm |
| December | -7.7 °C | 3.6 °C | 22.35 mm |
| Annual | 4.1 °C | 16.8 °C | 696.48 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |