Sauk Rapids, MN 56379 Frost Dates
56379, near Sauk Rapids, MN: the frost window
Typically, the last spring freeze lands around 05/07, roughly 252 days out. Fall's first freeze usually shows up around 09/30, roughly 144 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 Sauk Rapids, not a forecast for this year.
Stretching the season past the first frost
Sauk Rapids'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.
The actual range around Sauk Rapids's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/23 and only about 1 year in 10 sees frost after that.
Sauk Rapids against the rest of the dataset
Sauk Rapids's growing season runs about 144 days, ranking 36,342 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 647 of 943.
Learn more
Two guides worth reading on 56379: the frost range, on how to read the range around Sauk Rapids's dates instead of trusting one, and local microclimates, on what one yard in Sauk Rapids can differ from the 56379 normal.