Revillo, SD 57259 Frost Dates
Frost dates for Revillo, SD, ZIP 57259
Around 05/03 is the usual last spring frost, about 248 days away. The first fall frost typically arrives around 10/02, about 151 frost-free days later.
Revillo sits in USDA Zone 4b (-25 to -20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 4b around Revillo 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.
How much risk comes with planting early here
05/03 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. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Revillo compares
Revillo's growing season runs about 151 days, ranking 35,200 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 164 of 378.
Learn more
local microclimates explains what one yard in Revillo can differ from the 57259 normal, and zone vs. frost date explains why Zone 4b and Revillo's frost date answer different questions.