Sisseton, SD 57262 Frost Dates
57262, near Sisseton, SD: the frost window
Around 05/04 is the usual last spring frost, about 249 days away. Fall's first freeze usually shows up around 10/03, roughly 151 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Sisseton in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Sisseton'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 Sisseton's last frost
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 05/17 and only about 1 year in 10 sees frost after that.
Sisseton against the rest of the dataset
At roughly 151 frost-free days, Sisseton places 35,048 of 40,283 ZIP codes in this dataset. Within SD, it ranks 144 of 378.
Learn more
Two guides worth reading on 57262: the frost range, on how to read the range around Sisseton's dates instead of trusting one, and local microclimates, on what one yard in Sisseton can differ from the 57262 normal.