| 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 60107 - Streamwood, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 16 | 27 | 37 | 47 | 57 | 62 | 60 | 52 | 40 | 30 | 18 | 38 |
| Avg Max Temp (°F) | 28 | 34 | 45 | 58 | 70 | 80 | 83 | 81 | 74 | 62 | 47 | 33 | 58 |
| Avg Precip (In.) | 1.66 | 1.41 | 2.34 | 3.76 | 3.81 | 4.3 | 3.88 | 4.48 | 3.5 | 2.62 | 3.04 | 2.14 | 36.95 |