| 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 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 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 54401 - Wausau, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 3 | 8 | 20 | 32 | 44 | 53 | 59 | 57 | 47 | 36 | 24 | 10 | 33 |
| Avg Max Temp (°F) | 22 | 28 | 39 | 54 | 68 | 76 | 80 | 78 | 68 | 56 | 39 | 26 | 53 |
| Avg Precip (In.) | 1.08 | .89 | 1.89 | 2.8 | 3.51 | 4.1 | 4.08 | 4.48 | 4.11 | 2.6 | 2.21 | 1.31 | 33.05 |