| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| 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: | 53b - Kettle Moraines | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 53228 - Milwaukee, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 17 | 26 | 37 | 47 | 57 | 63 | 62 | 53 | 42 | 30 | 18 | 39 |
| Avg Max Temp (°F) | 27 | 32 | 42 | 55 | 68 | 78 | 82 | 80 | 72 | 60 | 45 | 32 | 56 |
| Avg Precip (In.) | 1.52 | 1.38 | 2.24 | 3.65 | 3.03 | 3.66 | 3.69 | 4.11 | 3.42 | 2.49 | 2.6 | 1.99 | 33.78 |