| 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: | 53b - Kettle Moraines | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 60097 - Wonder Lake, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 16 | 26 | 36 | 47 | 57 | 62 | 60 | 52 | 41 | 29 | 18 | 38 |
| Avg Max Temp (°F) | 28 | 33 | 44 | 57 | 70 | 79 | 83 | 81 | 74 | 62 | 46 | 33 | 57 |
| Avg Precip (In.) | 1.66 | 1.4 | 2.36 | 3.71 | 3.6 | 4.27 | 3.92 | 4.4 | 3.46 | 2.58 | 2.83 | 2.05 | 36.24 |