Wisconsin Frost Dates
Wisconsin has a moderate to short growing season depending on location, with Great Lakes influence and latitude both playing important roles. Southern and urban areas often get a bit more margin, while northern woods and inland frost pockets can stay chilly well into spring.
Look up your exact frost dates
Frost timing shifts across Wisconsin with elevation and distance from water. Enter your ZIP code for dates from your nearest weather station.
Wisconsin locations
| ZIP | Area | Hardiness zone |
|---|---|---|
| 53022 | Germantown | 5b |
| 53031 | Hingham | 5b |
| 53032 | Horicon | 5a |
| 53037 | Jackson | 5b |
| 53128 | Bloomfield | 5b |
| 53143 | Kenosha | 6a |
| 53167 | Rochester | 5b |
| 53182 | Yorkville | 5b |
| 53214 | West Allis | 5b |
| 53222 | Milwaukee | 5b |
| 53404 | Racine | 6a |
| 53538 | Lake Koshkonong | 5b |
| 53594 | Waterloo | 5b |
| 53704 | Madison | 5b |
| 53934 | Friendship | 4b |
| 53959 | Reedsburg | 5a |
| 54022 | River Falls | 4b |
| 54449 | Marshfield | 4b |
| 54521 | Eagle River | 4b |
| 54838 | Gordon | 4a |
| 53001 | Batavia | 5b |
| 53002 | Allenton | 5a |
| 53003 | Ashippun | 5a |
| 53004 | Belgium | 5b |
| 53005 | Brookfield | 5b |
| 53006 | Brownsville | 5a |
| 53007 | Butler | 5b |
| 53010 | Campbellsport | 5a |
| 53011 | Cascade | 5b |
| 53012 | Cedarburg | 5b |
| 53013 | Cedar Grove | 5b |
| 53014 | Chilton | 5b |
| 53015 | Cleveland | 5b |
| 53016 | Clyman | 5a |
| 53017 | Richfield | 5a |
| 53018 | Delafield | 5b |
| 53019 | Eden | 5a |
| 53020 | Elkhart Lake | 5b |
| 53021 | Waubeka | 5b |
| 53023 | Greenbush | 5b |
| 53024 | Grafton | 6a |
| 53027 | Hartford | 5a |
| 53029 | Merton | 5b |
| 53033 | Richfield | 5a |
| 53034 | Hustisford | 5a |
| 53035 | Iron Ridge | 5a |
| 53036 | Ixonia | 5a |
| 53038 | Johnson Creek | 5b |
| 53039 | Juneau | 5a |
| 53040 | Kewaskum | 5b |
| 53042 | Kiel | 5b |
| 53044 | Kohler | 5b |
| 53045 | Brookfield | 5b |
| 53046 | Lannon | 5b |
| 53047 | Lebanon | 5a |
| 53048 | Lomira | 5a |
| 53049 | St. Peter | 5b |
| 53050 | Mayville | 5a |
| 53051 | Menomonee Falls | 5b |
| 53057 | Mount Calvary | 5b |
Source: NOAA 1991–2020 U.S. Climate Normals (public domain) and USDA 2023 Plant Hardiness Zone Map. Page updated Aug 4, 2026.