| 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 | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 60913 - Bonfield, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 18 | 28 | 38 | 49 | 59 | 63 | 60 | 53 | 41 | 31 | 20 | 39 |
| Avg Max Temp (°F) | 31 | 36 | 48 | 61 | 73 | 83 | 85 | 83 | 77 | 66 | 49 | 36 | 61 |
| Avg Precip (In.) | 1.66 | 1.59 | 2.75 | 3.68 | 4.2 | 4.47 | 3.99 | 3.71 | 3.23 | 2.87 | 3.24 | 2.49 | 37.86 |