| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | 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: | 51b - Central Wisconsin Undulating Till Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54443 - Junction City, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 3 | 8 | 19 | 32 | 44 | 53 | 58 | 55 | 46 | 35 | 23 | 10 | 32 |
| Avg Max Temp (°F) | 22 | 29 | 40 | 55 | 68 | 77 | 81 | 78 | 69 | 57 | 41 | 27 | 54 |
| Avg Precip (In.) | 1.09 | .96 | 1.92 | 2.9 | 3.63 | 3.91 | 4.14 | 4.28 | 3.89 | 2.44 | 2.25 | 1.31 | 32.71 |