Sioux Falls, SD 57110 Frost Dates
Frost dates for Sioux Falls, SD, ZIP 57110
Typically, the last spring freeze lands around 05/01, roughly 246 days out. The first fall frost typically arrives around 10/06, about 157 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 Sioux Falls, not a forecast for this year.
What to do before the first frost
Zone 5a around Sioux Falls has about 6 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.
How much risk comes with planting early here
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/18 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sioux Falls compares
About 157 days separate Sioux Falls's last and first frost, putting it 33,190 of 40,283 ZIP codes nationally. Within SD, it ranks 64 of 378.
Learn more
local microclimates explains what one yard in Sioux Falls can differ from the 57110 normal, and zone vs. frost date explains why Zone 5a and Sioux Falls's frost date answer different questions.