Comstock, MN 56525 Frost Dates
56525, near Comstock, MN: the frost window
Typically, the last spring freeze lands around 05/04, roughly 249 days out. Fall's first freeze usually shows up around 10/02, roughly 151 days after the last spring frost.
Zone 4a (-30 to -25°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 Comstock, not a forecast for this year.
Stretching the season past the first frost
Comstock's growing season runs out in roughly 5 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
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
Comstock against the rest of the dataset
About 151 days separate Comstock's last and first frost, putting it 35,199 of 40,283 ZIP codes nationally. Within MN, it ranks 508 of 943.
Learn more
Two guides worth reading on 56525: the frost range, on how to read the range around Comstock's dates instead of trusting one, and local microclimates, on what one yard in Comstock can differ from the 56525 normal.