| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 39h - Current River Hills |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 65588 - Winona, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 25 | 33 | 42 | 52 | 60 | 65 | 63 | 56 | 44 | 34 | 25 | 43 |
| Avg Max Temp (°F) | 43 | 49 | 59 | 69 | 77 | 84 | 90 | 89 | 81 | 71 | 57 | 46 | 68 |
| Avg Precip (In.) | 2.51 | 2.73 | 4.24 | 4.51 | 4.63 | 3.89 | 3.76 | 3.48 | 3.66 | 3.27 | 4.82 | 3.86 | 45.36 |