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Frost dates and growing zones in Wisconsin

6 town pages so far. Zones from the 2023 USDA Plant Hardiness Zone Map, frost dates from NOAA 1991-2020 normals at the nearest weather station.

Towns covered so far in Wisconsin fall in USDA zones 4b, 5b, 6a. Median dates mean frost comes later (spring) or earlier (fall) in half of years.

Towns

TownZoneMedian last frostMedian first frost
Milwaukee6aApr 26Oct 18
Madison5bMay 1Oct 9
Green Bay5bApr 30Oct 9
Kenosha5bApr 19Oct 26
Appleton5bMay 4Oct 6
Eau Claire4bMay 8Oct 4

Zones in Wisconsin