| 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: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 39i - Eastern Ozark Border |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 63012 - Barnhart, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 22 | 32 | 42 | 51 | 60 | 66 | 64 | 55 | 43 | 33 | 23 | 42 |
| Avg Max Temp (°F) | 39 | 45 | 56 | 67 | 76 | 84 | 89 | 87 | 80 | 70 | 55 | 43 | 66 |
| Avg Precip (In.) | 2.23 | 2.35 | 3.78 | 4.05 | 4.12 | 3.84 | 3.35 | 3.42 | 3.16 | 2.87 | 4.12 | 3.14 | 40.43 |