Rosholt, SD 57260 Frost Dates
Frost dates for Rosholt, SD, ZIP 57260
The last spring frost here typically falls around 05/04, about 249 days from today. The first fall frost typically arrives around 10/03, about 152 frost-free days later.
The USDA Plant Hardiness Zone Map puts Rosholt in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 4b around Rosholt 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 Rosholt's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Rosholt compares
Rosholt's growing season runs about 152 days, ranking 34,877 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 135 of 378.
Learn more
local microclimates explains what one yard in Rosholt can differ from the 57260 normal, and zone vs. frost date explains why Zone 4b and Rosholt's frost date answer different questions.