| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 56g - Lansing Loamy Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49341 - Rockford, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 15 | 24 | 34 | 45 | 54 | 59 | 57 | 49 | 39 | 30 | 20 | 37 |
| Avg Max Temp (°F) | 29 | 33 | 43 | 57 | 70 | 79 | 82 | 80 | 72 | 60 | 46 | 34 | 57 |
| Avg Precip (In.) | 2.16 | 1.59 | 2.47 | 3.21 | 3.31 | 3.45 | 3 | 4.07 | 3.91 | 2.91 | 3.16 | 2.61 | 35.86 |