| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| 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 53086 - Slinger, WI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 13 | 24 | 34 | 45 | 54 | 59 | 57 | 49 | 38 | 27 | 15 | 35 |
| Avg Max Temp (°F) | 25 | 30 | 41 | 54 | 67 | 77 | 81 | 79 | 70 | 59 | 43 | 30 | 55 |
| Avg Precip (In.) | 1.35 | 1.13 | 2 | 3.14 | 3.07 | 3.84 | 4.06 | 4.19 | 3.58 | 2.6 | 2.4 | 1.62 | 32.96 |