| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 53b - Kettle Moraines |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53012 - Cedarburg, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 16 | 25 | 35 | 45 | 55 | 61 | 60 | 52 | 41 | 29 | 17 | 37 |
| Avg Max Temp (°F) | 26 | 31 | 41 | 54 | 66 | 76 | 81 | 79 | 71 | 59 | 44 | 32 | 55 |
| Avg Precip (In.) | 1.45 | 1.2 | 2.03 | 3.27 | 2.98 | 3.69 | 3.84 | 4.16 | 3.46 | 2.43 | 2.46 | 1.81 | 32.78 |