Wheaton, MN 56296 Frost Dates
Wheaton, MN: when does the frost end?
The last spring frost here typically falls around 05/01, about 246 days from today. Fall's first freeze usually shows up around 10/09, roughly 160 days after the last spring frost.
Zone 4b (-25 to -20°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 Wheaton, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Wheaton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/01 isn't a guarantee
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/18 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.
Wheaton against the rest of the dataset
At roughly 160 frost-free days, Wheaton places 32,415 of 40,283 ZIP codes in this dataset. Within MN, it ranks 225 of 943.
Learn more
Before leaning on 56296's figures: the frost range explains how to read the range around Wheaton's dates instead of trusting one, while local microclimates explains what one yard in Wheaton can differ from the 56296 normal.