Orient, SD 57467 Frost Dates
57467, near Orient, SD: the frost window
Around 05/14 is the usual last spring frost, about 259 days away. Fall's first freeze usually shows up around 09/29, roughly 138 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Orient in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Orient'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.
Why 05/14 isn't a guarantee
05/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/25 and only about 1 year in 10 sees frost after that.
Orient against the rest of the dataset
About 138 days separate Orient's last and first frost, putting it 37,486 of 40,283 ZIP codes nationally. Within SD, it ranks 336 of 378.
Learn more
Two guides worth reading on 57467: zone vs. frost date, on why Zone 4b and Orient's frost date answer different questions, and the frost range, on how to read the range around Orient's dates instead of trusting one.