| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 54b - Chicago Lake Plain | |
| Current Drought Status: | Abnormally Dry | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 60614 - Chicago, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 21 | 30 | 40 | 50 | 59 | 65 | 64 | 56 | 44 | 33 | 22 | 42 |
| Avg Max Temp (°F) | 31 | 37 | 47 | 59 | 70 | 80 | 84 | 82 | 76 | 64 | 49 | 36 | 60 |
| Avg Precip (In.) | 1.98 | 1.69 | 2.8 | 3.72 | 3.71 | 4.14 | 3.71 | 4.04 | 3.31 | 2.73 | 3.19 | 2.58 | 37.59 |