| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 54e - Chiwaukee Prairie Region | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53182 - Union Grove, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 16 | 26 | 36 | 46 | 56 | 62 | 61 | 52 | 41 | 29 | 18 | 38 |
| Avg Max Temp (°F) | 27 | 32 | 43 | 55 | 68 | 77 | 82 | 80 | 72 | 61 | 46 | 33 | 56 |
| Avg Precip (In.) | 1.38 | 1.18 | 2.09 | 3.63 | 3.22 | 4.03 | 3.79 | 4.46 | 3.44 | 2.45 | 2.55 | 1.8 | 34.01 |