| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°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: | 51f - Green Bay Till and Lacustrine Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54942 - Greenville, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 11 | 21 | 34 | 46 | 55 | 60 | 58 | 49 | 38 | 26 | 13 | 35 |
| Avg Max Temp (°F) | 24 | 29 | 40 | 55 | 69 | 78 | 82 | 79 | 70 | 58 | 42 | 29 | 55 |
| Avg Precip (In.) | 1.29 | 1.05 | 2.06 | 2.84 | 3.19 | 3.67 | 3.66 | 3.99 | 3.31 | 2.35 | 2.25 | 1.41 | 31.06 |