White River, SD 57560 Frost Dates
When can you plant in White River, SD?
The last spring frost here typically falls around 05/06, about 251 days from today. The first fall frost typically arrives around 10/04, about 151 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 White River, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in White River before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around White River's last frost
05/06 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. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How White River compares
About 151 days separate White River's last and first frost, putting it 35,131 of 40,283 ZIP codes nationally. Within SD, it ranks 153 of 378.
Learn more
zone vs. frost date covers why Zone 5a and White River's frost date answer different questions. the frost range covers how to read the range around White River's dates instead of trusting one.