Brewster, MN 56119 Frost Dates
56119, near Brewster, MN: the frost window
Typically, the last spring freeze lands around 05/03, roughly 248 days out. Fall's first freeze usually shows up around 10/04, roughly 153 days after the last spring frost.
Zone 5a (-20 to -15°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 Brewster, not a forecast for this year.
Stretching the season past the first frost
Brewster'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 Brewster's last frost
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Brewster against the rest of the dataset
About 153 days separate Brewster's last and first frost, putting it 34,599 of 40,283 ZIP codes nationally. Within MN, it ranks 425 of 943.
Learn more
Two guides worth reading on 56119: zone vs. frost date, on why Zone 5a and Brewster's frost date answer different questions, and the frost range, on how to read the range around Brewster's dates instead of trusting one.