Glendale, WI 53218 Frost Dates
53218, near Glendale, WI: the frost window
Typically, the last spring freeze lands around 04/26, roughly 241 days out. Fall's first freeze usually shows up around 10/18, roughly 173 days after the last spring frost.
Glendale sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Glendale's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Glendale against the rest of the dataset
Glendale's growing season runs about 173 days, ranking 27,811 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 106 of 860.
Learn more
Two guides worth reading on 53218: local microclimates, on what one yard in Glendale can differ from the 53218 normal, and zone vs. frost date, on why Zone 6a and Glendale's frost date answer different questions.