McIntosh, MN 56556 Frost Dates
McIntosh, MN: when does the frost end?
Around 05/15 is the usual last spring frost, about 260 days away. Fall's first freeze usually shows up around 09/26, roughly 132 days after the last spring frost.
Zone 3b (-35 to -30°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 McIntosh, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until McIntosh's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around McIntosh's last frost
05/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
McIntosh against the rest of the dataset
At roughly 132 frost-free days, McIntosh places 38,211 of 40,283 ZIP codes in this dataset. Within MN, it ranks 826 of 943.
Learn more
Before leaning on 56556's figures: the frost range explains how to read the range around McIntosh's dates instead of trusting one, while local microclimates explains what one yard in McIntosh can differ from the 56556 normal.