| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 51b - Central Wisconsin Undulating Till Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54771 - Thorp, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 0 | 5 | 18 | 32 | 43 | 52 | 57 | 55 | 46 | 35 | 22 | 7 | 31 |
| Avg Max Temp (°F) | 20 | 27 | 38 | 54 | 67 | 76 | 80 | 77 | 68 | 57 | 39 | 25 | 52 |
| Avg Precip (In.) | 1.05 | .83 | 1.72 | 2.64 | 3.49 | 4.28 | 4.16 | 4.52 | 3.91 | 2.35 | 2.16 | 1.15 | 32.25 |