| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Nov. 1 - Nov. 10 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 74a - Bluff Hills |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 63841 - Dexter, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 30 | 39 | 48 | 58 | 66 | 70 | 68 | 60 | 48 | 39 | 30 | 48 |
| Avg Max Temp (°F) | 43 | 50 | 60 | 70 | 80 | 88 | 92 | 90 | 83 | 73 | 58 | 47 | 69 |
| Avg Precip (In.) | 3.44 | 3.58 | 4.85 | 4.56 | 4.86 | 4.08 | 3.79 | 3.1 | 3.17 | 3.21 | 4.75 | 4.58 | 47.98 |