Winnetoon, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.1 °F (low) to 60.6 °F (high). Annual precipitation averages 28 Inches. 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 °F | 32.2 °F | 0.57 in. |
| February | 14.9 °F | 37.0 °F | 0.82 in. |
| March | 24.6 °F | 48.6 °F | 1.55 in. |
| April | 35.4 °F | 60.6 °F | 3.09 in. |
| May | 47.4 °F | 71.7 °F | 4.19 in. |
| June | 58.3 °F | 82.0 °F | 4.14 in. |
| July | 63.0 °F | 86.5 °F | 3.23 in. |
| August | 60.6 °F | 84.6 °F | 3.52 in. |
| September | 51.2 °F | 77.4 °F | 2.55 in. |
| October | 37.9 °F | 64.0 °F | 2.41 in. |
| November | 25.0 °F | 47.9 °F | 1.06 in. |
| December | 14.9 °F | 35.1 °F | 0.83 in. |
| Annual | 37.1 °F | 60.6 °F | 27.96 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |