| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°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: | 73c - St. Francis Lowlands |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 63862 - Lilbourn, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 29 | 38 | 48 | 57 | 66 | 70 | 67 | 59 | 47 | 39 | 29 | 48 |
| Avg Max Temp (°F) | 42 | 48 | 58 | 69 | 78 | 87 | 91 | 89 | 82 | 72 | 58 | 47 | 68 |
| Avg Precip (In.) | 3.34 | 3.65 | 4.72 | 5 | 5.02 | 4.17 | 3.93 | 2.74 | 3.37 | 3.46 | 4.73 | 4.56 | 48.7 |