| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 72f - River Hills |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 65041 - Hermann, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 23 | 32 | 42 | 51 | 61 | 65 | 63 | 54 | 43 | 33 | 23 | 42 |
| Avg Max Temp (°F) | 38 | 45 | 56 | 68 | 76 | 84 | 90 | 88 | 80 | 70 | 54 | 42 | 66 |
| Avg Precip (In.) | 2.02 | 2.2 | 3.38 | 3.85 | 4.71 | 4.04 | 4.01 | 3.65 | 3.85 | 3.09 | 3.88 | 2.99 | 41.67 |