Amboy, MN 56010 Frost Dates
56010, near Amboy, MN: the frost window
Typically, the last spring freeze lands around 04/30, roughly 245 days out. Fall's first freeze usually shows up around 10/07, roughly 161 days after the last spring frost.
Amboy 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
Amboy's growing season runs out in roughly 6 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
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 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.
Amboy against the rest of the dataset
At roughly 161 frost-free days, Amboy places 32,134 of 40,283 ZIP codes in this dataset. Within MN, it ranks 208 of 943.
Learn more
Two guides worth reading on 56010: the frost range, on how to read the range around Amboy's dates instead of trusting one, and local microclimates, on what one yard in Amboy can differ from the 56010 normal.