Winnetoon, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.8 °C (low) to 15.9 °C (high). Annual precipitation averages 710.2 Millimeters. Winnetoon 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 | -11.4 °C | 0.1 °C | 14.48 mm |
| February | -9.5 °C | 2.8 °C | 20.83 mm |
| March | -4.1 °C | 9.2 °C | 39.37 mm |
| April | 1.9 °C | 15.9 °C | 78.49 mm |
| May | 8.6 °C | 22.1 °C | 106.43 mm |
| June | 14.6 °C | 27.8 °C | 105.16 mm |
| July | 17.2 °C | 30.3 °C | 82.04 mm |
| August | 15.9 °C | 29.2 °C | 89.41 mm |
| September | 10.7 °C | 25.2 °C | 64.77 mm |
| October | 3.3 °C | 17.8 °C | 61.21 mm |
| November | -3.9 °C | 8.8 °C | 26.92 mm |
| December | -9.5 °C | 1.7 °C | 21.08 mm |
| Annual | 2.8 °C | 15.9 °C | 710.19 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |