| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 54a - Illinois/Indiana Prairies | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 60551 - Sheridan, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 17 | 28 | 38 | 49 | 59 | 63 | 61 | 52 | 41 | 30 | 18 | 39 |
| Avg Max Temp (°F) | 29 | 35 | 47 | 60 | 72 | 82 | 85 | 83 | 76 | 64 | 48 | 34 | 59 |
| Avg Precip (In.) | 1.62 | 1.5 | 2.65 | 3.63 | 4.12 | 4.26 | 3.91 | 3.87 | 3.39 | 2.69 | 3.05 | 2.33 | 37.01 |