| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 54e - Chiwaukee Prairie Region | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 60087 - Waukegan, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 17 | 26 | 36 | 46 | 56 | 62 | 61 | 53 | 42 | 30 | 19 | 38 |
| Avg Max Temp (°F) | 28 | 33 | 43 | 55 | 67 | 77 | 81 | 80 | 73 | 61 | 47 | 34 | 56 |
| Avg Precip (In.) | 1.64 | 1.38 | 2.23 | 3.73 | 3.44 | 3.71 | 3.64 | 4.25 | 3.43 | 2.46 | 2.61 | 2.09 | 34.61 |