| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°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: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 52a - Savanna Section | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53813 - Lancaster, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 13 | 24 | 36 | 48 | 57 | 61 | 60 | 51 | 39 | 26 | 14 | 36 |
| Avg Max Temp (°F) | 23 | 30 | 42 | 56 | 68 | 78 | 81 | 79 | 71 | 59 | 42 | 29 | 55 |
| Avg Precip (In.) | .92 | 1.05 | 2.17 | 3.38 | 3.75 | 4.6 | 4.15 | 4.56 | 3.3 | 2.42 | 2.45 | 1.27 | 34.02 |