Wessington, SD 57381 Frost Dates
Frost dates for Wessington, SD, ZIP 57381
Typically, the last spring freeze lands around 05/03, roughly 248 days out. The first fall frost typically arrives around 10/03, about 152 frost-free days later.
The USDA Plant Hardiness Zone Map puts Wessington in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 4b around Wessington has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Wessington's last frost
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Wessington compares
About 152 days separate Wessington's last and first frost, putting it 34,902 of 40,283 ZIP codes nationally. Within SD, it ranks 138 of 378.
Learn more
the frost range explains how to read the range around Wessington's dates instead of trusting one, and local microclimates explains what one yard in Wessington can differ from the 57381 normal.