Verdon, SD 57439 Frost Dates
Verdon, SD: when does the frost end?
Typically, the last spring freeze lands around 05/06, roughly 251 days out. Fall's first freeze usually shows up around 10/04, roughly 150 days after the last spring frost.
Verdon sits in USDA Zone 4a (-30 to -25°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.
Stretching the season past the first frost
With roughly 5 weeks until Verdon's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Verdon's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Verdon against the rest of the dataset
About 150 days separate Verdon's last and first frost, putting it 35,470 of 40,283 ZIP codes nationally. Within SD, it ranks 180 of 378.
Learn more
Before leaning on 57439's figures: the frost range explains how to read the range around Verdon's dates instead of trusting one, while local microclimates explains what one yard in Verdon can differ from the 57439 normal.