| 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. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 72e - Middle Mississippi Alluvial Plain |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 63670 - Sainte Genevieve, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 25 | 34 | 44 | 54 | 63 | 67 | 65 | 57 | 45 | 35 | 26 | 45 |
| Avg Max Temp (°F) | 39 | 46 | 56 | 67 | 77 | 86 | 90 | 89 | 81 | 70 | 56 | 44 | 67 |
| Avg Precip (In.) | 2.27 | 2.36 | 3.81 | 3.89 | 4.34 | 3.7 | 3.91 | 3.47 | 3.45 | 3.16 | 4.27 | 3.32 | 41.97 |