| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°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: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 39i - Eastern Ozark Border |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 63072 - Robertsville, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 24 | 34 | 44 | 53 | 62 | 67 | 65 | 57 | 45 | 35 | 24 | 44 |
| Avg Max Temp (°F) | 39 | 46 | 57 | 68 | 77 | 85 | 90 | 88 | 81 | 70 | 56 | 43 | 67 |
| Avg Precip (In.) | 2.31 | 2.19 | 3.64 | 3.99 | 4.39 | 3.83 | 3.77 | 3.17 | 3.41 | 3.04 | 4 | 2.93 | 40.66 |