| 2023 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4a: -30°F to -25°F | |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 4a: -30°F to -25°F | |
| 1990 Hardiness Zone: | Zone 3b: -35F to -30F | |
| Average First Frost Date: | Sep.1 - Sep. 10 | |
| Average Last Frost Date: | Jun. 1 - Jun. 10 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 50e - Chequamegon Moraines and Outwash Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54817 - Birchwood, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | -1 | 5 | 18 | 31 | 42 | 52 | 58 | 55 | 45 | 34 | 21 | 7 | 31 |
| Avg Max Temp (°F) | 19 | 27 | 38 | 54 | 68 | 75 | 80 | 77 | 68 | 56 | 38 | 24 | 52 |
| Avg Precip (In.) | 1.08 | .85 | 1.81 | 2.5 | 3.26 | 4.29 | 4.5 | 4.6 | 4.14 | 2.82 | 2.07 | 1.06 | 32.99 |