| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | October 11 - 20 | |
| Average Last Frost Date: | April 21 - 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 40a - Loess Flats and Till Plains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 64689 - Winston, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 17 | 28 | 38 | 49 | 59 | 63 | 61 | 51 | 39 | 28 | 17 | 38 |
| Avg Max Temp (°F) | 34 | 40 | 52 | 64 | 74 | 83 | 88 | 86 | 78 | 67 | 50 | 38 | 63 |
| Avg Precip (In.) | 1.11 | 1.16 | 2.61 | 3.49 | 4.82 | 4.22 | 4.25 | 3.78 | 4.42 | 3.14 | 2.42 | 1.59 | 37.02 |