| 2023 Hardiness Zone: | 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: | 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: | 51b - Central Wisconsin Undulating Till Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54741 - Fairchild, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 1 | 7 | 20 | 33 | 45 | 54 | 59 | 57 | 47 | 36 | 23 | 8 | 32 |
| Avg Max Temp (°F) | 20 | 28 | 40 | 55 | 68 | 77 | 81 | 78 | 69 | 57 | 40 | 25 | 53 |
| Avg Precip (In.) | 1.12 | .85 | 1.95 | 2.97 | 3.57 | 4.31 | 4.41 | 4.47 | 4.16 | 2.49 | 2.24 | 1.23 | 33.78 |