| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F 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: | 52b - Paleozoic Plateau/Coulee Section |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54660 - Tomah, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 10 | 22 | 33 | 45 | 54 | 59 | 57 | 48 | 37 | 24 | 11 | 34 |
| Avg Max Temp (°F) | 24 | 31 | 42 | 57 | 70 | 78 | 82 | 80 | 71 | 59 | 42 | 28 | 55 |
| Avg Precip (In.) | 1.04 | .94 | 1.97 | 3.29 | 3.67 | 4.12 | 4.39 | 4.47 | 3.87 | 2.34 | 2.28 | 1.24 | 33.61 |