Wessington Springs, SD 57382 Frost Dates
Frost dates for Wessington Springs, SD, ZIP 57382
The last spring frost here typically falls around 05/07, about 252 days from today. The first fall frost typically arrives around 10/01, about 146 frost-free days later.
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 Wessington Springs, not a forecast for this year.
What to do before the first frost
Zone 5a around Wessington Springs 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 Springs's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 05/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Wessington Springs compares
Wessington Springs's growing season runs about 146 days, ranking 36,078 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 217 of 378.
Learn more
zone vs. frost date explains why Zone 5a and Wessington Springs's frost date answer different questions, and the frost range explains how to read the range around Wessington Springs's dates instead of trusting one.