| 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: | 72f - River Hills |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 63775 - Perryville, MO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 24 | 34 | 43 | 52 | 62 | 66 | 64 | 55 | 43 | 34 | 25 | 44 |
| Avg Max Temp (°F) | 40 | 46 | 57 | 67 | 76 | 85 | 89 | 88 | 80 | 70 | 56 | 44 | 67 |
| Avg Precip (In.) | 2.45 | 2.4 | 3.81 | 4.17 | 4.53 | 3.68 | 3.56 | 3.41 | 3.06 | 3.04 | 4.53 | 3.39 | 42.02 |