| 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: | 54f - Valparaiso-Wheaton Morainal Complex |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 60172 - Roselle, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 18 | 28 | 37 | 47 | 57 | 62 | 61 | 53 | 41 | 31 | 19 | 39 |
| Avg Max Temp (°F) | 29 | 35 | 46 | 59 | 71 | 80 | 84 | 82 | 75 | 63 | 47 | 34 | 59 |
| Avg Precip (In.) | 1.7 | 1.48 | 2.46 | 3.74 | 3.73 | 4.13 | 3.84 | 4.49 | 3.41 | 2.63 | 3.05 | 2.26 | 36.92 |