| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 52b - Paleozoic Plateau/Coulee Section |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53578 - Prairie du Sac, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 11 | 23 | 35 | 46 | 55 | 60 | 58 | 49 | 38 | 25 | 13 | 35 |
| Avg Max Temp (°F) | 25 | 31 | 42 | 56 | 70 | 79 | 83 | 80 | 72 | 60 | 43 | 30 | 56 |
| Avg Precip (In.) | 1.08 | 1.07 | 2.01 | 3.19 | 3.17 | 4 | 3.91 | 4.32 | 3.31 | 2.25 | 2.12 | 1.26 | 31.7 |