| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| 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 54449 - Marshfield, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 2 | 8 | 19 | 32 | 44 | 53 | 58 | 55 | 46 | 35 | 23 | 9 | 32 |
| Avg Max Temp (°F) | 22 | 28 | 39 | 55 | 68 | 77 | 81 | 78 | 69 | 58 | 40 | 26 | 53 |
| Avg Precip (In.) | 1.01 | .88 | 1.86 | 2.89 | 3.64 | 4.2 | 4.13 | 4.34 | 4.07 | 2.48 | 2.25 | 1.25 | 33 |