| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| 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: | 72i - Western Dissected Illinoian Till Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 62353 - Mount Sterling, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 20 | 30 | 41 | 52 | 61 | 65 | 63 | 54 | 43 | 31 | 21 | 41 |
| Avg Max Temp (°F) | 32 | 39 | 51 | 63 | 73 | 82 | 87 | 85 | 78 | 66 | 50 | 37 | 62 |
| Avg Precip (In.) | 1.57 | 1.62 | 2.84 | 3.67 | 4.91 | 3.86 | 3.97 | 3.29 | 3.43 | 3.13 | 3.12 | 2.31 | 37.74 |