Suamico, WI 54171 Frost Dates
Suamico, WI: when does the frost end?
Around 05/07 is the usual last spring frost, about 252 days away. Fall's first freeze usually shows up around 10/09, roughly 154 days after the last spring frost.
Zone 5a (-20 to -15°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 Suamico, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Suamico's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Suamico's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Suamico against the rest of the dataset
About 154 days separate Suamico's last and first frost, putting it 34,236 of 40,283 ZIP codes nationally. Within WI, it ranks 468 of 860.
Learn more
Before leaning on 54171's figures: the frost range explains how to read the range around Suamico's dates instead of trusting one, while local microclimates explains what one yard in Suamico can differ from the 54171 normal.