Lake Preston, SD 57249 Frost Dates
Lake Preston, SD: when does the frost end?
The last spring frost here typically falls around 05/03, about 248 days from today. Fall's first freeze usually shows up around 10/02, roughly 151 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lake Preston 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
With roughly 5 weeks until Lake Preston's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/03 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 05/15 and only about 1 year in 10 sees frost after that.
Lake Preston against the rest of the dataset
About 151 days separate Lake Preston's last and first frost, putting it 35,122 of 40,283 ZIP codes nationally. Within SD, it ranks 152 of 378.
Learn more
Before leaning on 57249's figures: local microclimates explains what one yard in Lake Preston can differ from the 57249 normal, while zone vs. frost date explains why Zone 4b and Lake Preston's frost date answer different questions.