Martin, SD 57714 Frost Dates
When can you plant in Martin, SD?
Around 05/11 is the usual last spring frost, about 256 days away. The first fall frost typically arrives around 10/01, about 139 frost-free days later.
Martin sits in USDA Zone 5a (-20 to -15°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 5 weeks of growing season left in Martin before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Martin's last frost
05/11 is the middle of 30 years of NOAA records, not a promise. Plant by 04/29 and you're betting against frost in roughly 9 years out of 10. 05/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Martin compares
At roughly 139 frost-free days, Martin places 37,253 of 40,283 ZIP codes in this dataset. Within SD, it ranks 317 of 378.
Learn more
zone vs. frost date covers why Zone 5a and Martin's frost date answer different questions. the frost range covers how to read the range around Martin's dates instead of trusting one.