| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F 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: | 54g - Rock River Hills |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 61021 - Dixon, IL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 15 | 27 | 37 | 49 | 58 | 62 | 60 | 51 | 40 | 28 | 16 | 38 |
| Avg Max Temp (°F) | 26 | 32 | 45 | 58 | 70 | 79 | 82 | 81 | 74 | 62 | 45 | 32 | 57 |
| Avg Precip (In.) | 1.56 | 1.41 | 2.53 | 3.59 | 4.28 | 4.83 | 3.5 | 4.41 | 3.32 | 2.7 | 2.79 | 2.09 | 37 |