Salem Lakes, WI 53170 Frost Dates
Salem Lakes, WI: when does the frost end?
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/15, roughly 167 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Salem Lakes, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Salem Lakes's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/16 and only about 1 year in 10 sees frost after that.
Salem Lakes against the rest of the dataset
About 167 days separate Salem Lakes's last and first frost, putting it 29,902 of 40,283 ZIP codes nationally. Within WI, it ranks 153 of 860.
Learn more
Before leaning on 53170's figures: local microclimates explains what one yard in Salem Lakes can differ from the 53170 normal, while zone vs. frost date explains why Zone 5b and Salem Lakes's frost date answer different questions.