Winona, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44 °F (low) to 68 °F (high). Annual precipitation averages 49.4 Inches. Winona is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.5 °F | 44.2 °F | 2.88 in. |
| February | 25.6 °F | 49.1 °F | 3.13 in. |
| March | 33.5 °F | 58.9 °F | 4.64 in. |
| April | 43.3 °F | 69.5 °F | 5.67 in. |
| May | 53.2 °F | 76.8 °F | 5.68 in. |
| June | 61.7 °F | 84.3 °F | 3.99 in. |
| July | 65.8 °F | 88.7 °F | 4.2 in. |
| August | 64.1 °F | 88.0 °F | 3.65 in. |
| September | 55.6 °F | 81.0 °F | 3.72 in. |
| October | 43.3 °F | 70.4 °F | 3.74 in. |
| November | 34.0 °F | 57.7 °F | 4.81 in. |
| December | 25.8 °F | 46.9 °F | 3.29 in. |
| Annual | 44 °F | 68 °F | 49.4 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |