Oelrichs, SD 57763 Frost Dates
Frost dates for Oelrichs, SD, ZIP 57763
Around 05/16 is the usual last spring frost, about 261 days away. The first fall frost typically arrives around 09/23, about 128 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 Oelrichs, not a forecast for this year.
What to do before the first frost
Zone 5a around Oelrichs has about 4 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
05/16 is the middle of 30 years of NOAA records, not a promise. Plant by 05/03 and you're betting against frost in roughly 9 years out of 10. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oelrichs compares
Oelrichs's growing season runs about 128 days, ranking 38,586 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 369 of 378.
Learn more
local microclimates explains what one yard in Oelrichs can differ from the 57763 normal, and zone vs. frost date explains why Zone 5a and Oelrichs's frost date answer different questions.