| 2023 Hardiness Zone: | 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 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 53c - Southeastern Wisconsin Savannah and Till Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53061 - New Holstein, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 12 | 22 | 34 | 45 | 55 | 60 | 58 | 49 | 38 | 27 | 14 | 35 |
| Avg Max Temp (°F) | 24 | 29 | 41 | 55 | 69 | 78 | 83 | 80 | 71 | 59 | 43 | 29 | 55 |
| Avg Precip (In.) | 1.41 | 1.18 | 2.14 | 2.9 | 3.09 | 3.8 | 3.64 | 4.02 | 3.58 | 2.49 | 2.33 | 1.58 | 32.16 |