Midland, SD 57552 Frost Dates
When can you plant in Midland, SD?
Typically, the last spring freeze lands around 05/12, roughly 257 days out. The first fall frost typically arrives around 09/28, about 138 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 Midland, not a forecast for this year.
What to do before the first frost
About 4 weeks of growing season left in Midland before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Midland's last frost
05/12 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Midland compares
Midland's growing season runs about 138 days, ranking 37,474 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 333 of 378.
Learn more
local microclimates covers what one yard in Midland can differ from the 57552 normal. zone vs. frost date covers why Zone 4b and Midland's frost date answer different questions.