Claire City, SD 57224 Frost Dates
57224, near Claire City, SD: the frost window
Around 05/04 is the usual last spring frost, about 249 days away. Fall's first freeze usually shows up around 10/03, roughly 151 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Claire City 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
Claire City'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 Claire City's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Claire City against the rest of the dataset
At roughly 151 frost-free days, Claire City places 35,209 of 40,283 ZIP codes in this dataset. Within SD, it ranks 165 of 378.
Learn more
Two guides worth reading on 57224: local microclimates, on what one yard in Claire City can differ from the 57224 normal, and zone vs. frost date, on why Zone 4b and Claire City's frost date answer different questions.