| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| 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: | 53c - Southeastern Wisconsin Savannah and Till Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53032 - Horicon, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 11 | 23 | 35 | 46 | 56 | 61 | 58 | 49 | 38 | 27 | 14 | 36 |
| Avg Max Temp (°F) | 25 | 30 | 41 | 55 | 68 | 77 | 82 | 79 | 71 | 60 | 43 | 30 | 55 |
| Avg Precip (In.) | 1.15 | 1.1 | 2.07 | 3.28 | 3.13 | 3.89 | 4.22 | 4.05 | 3.73 | 2.61 | 2.14 | 1.47 | 32.84 |