Tea, SD 57064 Frost Dates
57064, near Tea, SD: the frost window
Typically, the last spring freeze lands around 05/01, roughly 246 days out. Fall's first freeze usually shows up around 10/06, roughly 157 days after the last spring frost.
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 Tea, not a forecast for this year.
Stretching the season past the first frost
Tea's growing season runs out in roughly 6 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 Tea's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Tea against the rest of the dataset
Tea's growing season runs about 157 days, ranking 33,293 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 67 of 378.
Learn more
Two guides worth reading on 57064: zone vs. frost date, on why Zone 5a and Tea's frost date answer different questions, and the frost range, on how to read the range around Tea's dates instead of trusting one.