| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| 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 | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54665 - Viroqua, 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) | 22 | 29 | 41 | 56 | 68 | 77 | 81 | 78 | 70 | 58 | 41 | 27 | 54 |
| Avg Precip (In.) | .89 | .78 | 1.53 | 3.52 | 3.62 | 4.06 | 4.8 | 4.57 | 3.6 | 2.25 | 2.05 | 1.27 | 32.95 |