Nunda, SD 57057 Frost Dates
Nunda, SD: when does the frost end?
Typically, the last spring freeze lands around 05/02, roughly 247 days out. Fall's first freeze usually shows up around 10/05, roughly 156 days after the last spring frost.
Zone 4b (-25 to -20°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 Nunda, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Nunda'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
05/02 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.
Nunda against the rest of the dataset
Nunda's growing season runs about 156 days, ranking 33,892 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 98 of 378.
Learn more
Before leaning on 57057's figures: the frost range explains how to read the range around Nunda's dates instead of trusting one, while local microclimates explains what one yard in Nunda can differ from the 57057 normal.