Winner, SD 57534 Frost Dates
When can you plant in Winner, SD?
Typically, the last spring freeze lands around 05/01, roughly 246 days out. The first fall frost typically arrives around 10/10, about 162 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 Winner, not a forecast for this year.
What to do before the first frost
About 6 weeks of growing season left in Winner before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Winner's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Winner compares
Winner's growing season runs about 162 days, ranking 31,739 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 23 of 378.
Learn more
the frost range covers how to read the range around Winner's dates instead of trusting one. local microclimates covers what one yard in Winner can differ from the 57534 normal.