| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 50i - Northern Highlands Lakes Country |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54487 - Tomahawk, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -2 | 4 | 16 | 29 | 41 | 51 | 55 | 53 | 44 | 35 | 23 | 8 | 30 |
| Avg Max Temp (°F) | 21 | 28 | 38 | 53 | 67 | 75 | 79 | 77 | 67 | 56 | 38 | 26 | 52 |
| Avg Precip (In.) | 1.18 | .88 | 1.88 | 2.54 | 3.29 | 4.07 | 3.99 | 4.01 | 4.42 | 2.58 | 2.31 | 1.29 | 32.42 |