| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F |
| Average First Frost Date: | Sep.11 - Sep. 20 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 50j - Brule and Paint Rive Drumlins |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54121 - Florence, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -2 | 2 | 14 | 28 | 40 | 48 | 53 | 52 | 43 | 33 | 22 | 7 | 28 |
| Avg Max Temp (°F) | 21 | 26 | 37 | 51 | 66 | 74 | 78 | 76 | 66 | 53 | 37 | 25 | 51 |
| Avg Precip (In.) | 1.26 | .83 | 1.82 | 2.39 | 3.08 | 3.43 | 3.47 | 3.95 | 3.78 | 2.63 | 2.04 | 1.41 | 30.08 |