| 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 4b: -25F to -20F |
| 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: | 52b - Paleozoic Plateau/Coulee Section |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 54669 - West Salem, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 5 | 11 | 23 | 36 | 47 | 56 | 61 | 59 | 50 | 39 | 26 | 12 | 35 |
| Avg Max Temp (°F) | 24 | 31 | 43 | 58 | 71 | 79 | 83 | 81 | 72 | 60 | 42 | 28 | 56 |
| Avg Precip (In.) | 1.03 | .87 | 1.91 | 3.34 | 3.71 | 4.14 | 4.44 | 4.49 | 3.72 | 2.29 | 2.22 | 1.17 | 33.34 |