Presho, SD 57568 Frost Dates
57568, near Presho, SD: the frost window
The last spring frost here typically falls around 05/12, about 257 days from today. Fall's first freeze usually shows up around 09/28, roughly 137 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 Presho, not a forecast for this year.
Stretching the season past the first frost
Presho'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.
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 04/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/26 and only about 1 year in 10 sees frost after that.
Presho against the rest of the dataset
About 137 days separate Presho's last and first frost, putting it 37,566 of 40,283 ZIP codes nationally. Within SD, it ranks 342 of 378.
Learn more
Two guides worth reading on 57568: the frost range, on how to read the range around Presho's dates instead of trusting one, and local microclimates, on what one yard in Presho can differ from the 57568 normal.