Beltrami, MN 56517 Frost Dates
56517, near Beltrami, MN: the frost window
Typically, the last spring freeze lands around 05/11, roughly 256 days out. Fall's first freeze usually shows up around 09/27, roughly 137 days after the last spring frost.
Beltrami sits in USDA Zone 4a (-30 to -25°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
Beltrami's growing season runs out in roughly 4 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 Beltrami's last frost
05/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/25 and only about 1 year in 10 sees frost after that.
Beltrami against the rest of the dataset
At roughly 137 frost-free days, Beltrami places 37,602 of 40,283 ZIP codes in this dataset. Within MN, it ranks 791 of 943.
Learn more
Two guides worth reading on 56517: the frost range, on how to read the range around Beltrami's dates instead of trusting one, and local microclimates, on what one yard in Beltrami can differ from the 56517 normal.