Ree Heights, SD 57371 Frost Dates
57371, near Ree Heights, SD: the frost window
Typically, the last spring freeze lands around 05/12, roughly 257 days out. Fall's first freeze usually shows up around 10/01, roughly 142 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 Ree Heights, not a forecast for this year.
Stretching the season past the first frost
Ree Heights'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
05/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
Ree Heights against the rest of the dataset
About 142 days separate Ree Heights's last and first frost, putting it 36,849 of 40,283 ZIP codes nationally. Within SD, it ranks 290 of 378.
Learn more
Two guides worth reading on 57371: the frost range, on how to read the range around Ree Heights's dates instead of trusting one, and local microclimates, on what one yard in Ree Heights can differ from the 57371 normal.