Colome, SD 57528 Frost Dates
Colome, SD: when does the frost end?
Around 05/01 is the usual last spring frost, about 246 days away. Fall's first freeze usually shows up around 10/10, roughly 162 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 Colome, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Colome's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/01 isn't a guarantee
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Colome against the rest of the dataset
About 162 days separate Colome's last and first frost, putting it 31,858 of 40,283 ZIP codes nationally. Within SD, it ranks 26 of 378.
Learn more
Before leaning on 57528's figures: the frost range explains how to read the range around Colome's dates instead of trusting one, while local microclimates explains what one yard in Colome can differ from the 57528 normal.