Conde, SD 57434 Frost Dates
57434, near Conde, SD: the frost window
Typically, the last spring freeze lands around 05/06, roughly 251 days out. Fall's first freeze usually shows up around 09/29, roughly 144 days after the last spring frost.
Conde 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
Conde's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Conde's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Conde against the rest of the dataset
At roughly 144 frost-free days, Conde places 36,473 of 40,283 ZIP codes in this dataset. Within SD, it ranks 262 of 378.
Learn more
Two guides worth reading on 57434: zone vs. frost date, on why Zone 4a and Conde's frost date answer different questions, and the frost range, on how to read the range around Conde's dates instead of trusting one.