Bayport, MN 55003 Frost Dates
55003, near Bayport, MN: the frost window
Around 04/22 is the usual last spring frost, about 237 days away. Fall's first freeze usually shows up around 10/19, roughly 178 days after the last spring frost.
Bayport sits in USDA Zone 5a (-20 to -15°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
Bayport'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
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Bayport against the rest of the dataset
At roughly 178 frost-free days, Bayport places 25,710 of 40,283 ZIP codes in this dataset. Within MN, it ranks 9 of 943.
Learn more
Two guides worth reading on 55003: the frost range, on how to read the range around Bayport's dates instead of trusting one, and local microclimates, on what one yard in Bayport can differ from the 55003 normal.