Strandburg, SD 57265 Frost Dates
When can you plant in Strandburg, SD?
Around 05/07 is the usual last spring frost, about 252 days away. The first fall frost typically arrives around 09/28, about 143 frost-free days later.
Strandburg 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.
What to do before the first frost
About 4 weeks of growing season left in Strandburg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/07 isn't a guarantee
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Strandburg compares
About 143 days separate Strandburg's last and first frost, putting it 36,679 of 40,283 ZIP codes nationally. Within SD, it ranks 278 of 378.
Learn more
zone vs. frost date covers why Zone 4b and Strandburg's frost date answer different questions. the frost range covers how to read the range around Strandburg's dates instead of trusting one.