| 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: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 54d - Sand Area |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 61241 - Colona, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 18 | 29 | 40 | 51 | 61 | 65 | 63 | 55 | 43 | 31 | 19 | 41 |
| Avg Max Temp (°F) | 29 | 35 | 47 | 61 | 73 | 82 | 85 | 83 | 76 | 64 | 47 | 34 | 60 |
| Avg Precip (In.) | 1.37 | 1.37 | 2.55 | 3.5 | 4.06 | 4.5 | 3.85 | 4.36 | 3.16 | 2.7 | 2.59 | 2.07 | 36.07 |