Hay Springs, Nebraska has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.1 °C (low) to 16 °C (high). Annual precipitation averages 486.2 Millimeters. Hay Springs 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 | -10.5 °C | 2.9 °C | 11.43 mm |
| February | -9.3 °C | 4.4 °C | 13.97 mm |
| March | -4.8 °C | 10.2 °C | 25.15 mm |
| April | -0.4 °C | 14.6 °C | 58.42 mm |
| May | 5.5 °C | 19.9 °C | 76.2 mm |
| June | 11.2 °C | 26.2 °C | 78.74 mm |
| July | 14.8 °C | 30.2 °C | 64.52 mm |
| August | 13.6 °C | 29.6 °C | 49.02 mm |
| September | 7.8 °C | 24.9 °C | 39.12 mm |
| October | 0.7 °C | 16.6 °C | 38.1 mm |
| November | -5.6 °C | 9.2 °C | 16.51 mm |
| December | -10.3 °C | 3.3 °C | 14.99 mm |
| Annual | 1.1 °C | 16 °C | 486.17 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |