| 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 1b: -15F to -10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| 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 63050 - Hillsboro, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 23 | 32 | 42 | 51 | 61 | 65 | 63 | 55 | 43 | 33 | 24 | 43 |
| Avg Max Temp (°F) | 39 | 46 | 56 | 68 | 76 | 84 | 89 | 87 | 80 | 70 | 55 | 44 | 66 |
| Avg Precip (In.) | 2.37 | 2.25 | 3.73 | 4.05 | 4.3 | 3.8 | 3.39 | 3.42 | 3.13 | 2.89 | 4.11 | 3.15 | 40.61 |