Wolsey, SD 57384 Frost Dates
Wolsey, SD: when does the frost end?
Around 05/06 is the usual last spring frost, about 251 days away. Fall's first freeze usually shows up around 10/02, roughly 146 days after the last spring frost.
Wolsey sits in USDA Zone 4b (-25 to -20°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
With roughly 5 weeks until Wolsey's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Wolsey against the rest of the dataset
Wolsey's growing season runs about 146 days, ranking 36,095 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 219 of 378.
Learn more
Before leaning on 57384's figures: the frost range explains how to read the range around Wolsey's dates instead of trusting one, while local microclimates explains what one yard in Wolsey can differ from the 57384 normal.