Corona, SD 57227 Frost Dates
When can you plant in Corona, SD?
Typically, the last spring freeze lands around 05/02, roughly 247 days out. The first fall frost typically arrives around 10/04, about 153 frost-free days later.
Zone 4b (-25 to -20°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 Corona, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in Corona before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Corona's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Corona compares
About 153 days separate Corona's last and first frost, putting it 34,661 of 40,283 ZIP codes nationally. Within SD, it ranks 129 of 378.
Learn more
local microclimates covers what one yard in Corona can differ from the 57227 normal. zone vs. frost date covers why Zone 4b and Corona's frost date answer different questions.