| 2023 Hardiness Zone: | 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. 11 - Oct. 20 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 53b - Kettle Moraines | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53150 - Muskego, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 16 | 26 | 36 | 47 | 57 | 62 | 61 | 52 | 41 | 29 | 18 | 38 |
| Avg Max Temp (°F) | 27 | 32 | 43 | 56 | 69 | 78 | 83 | 80 | 73 | 61 | 45 | 32 | 56 |
| Avg Precip (In.) | 1.5 | 1.31 | 2.23 | 3.59 | 3.08 | 3.81 | 3.79 | 4.37 | 3.44 | 2.5 | 2.58 | 1.89 | 34.08 |