Mobridge, SD 57601 Frost Dates
Mobridge, SD: when does the frost end?
The last spring frost here typically falls around 05/05, about 250 days from today. Fall's first freeze usually shows up around 10/04, roughly 150 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 Mobridge, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Mobridge's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Mobridge's last frost
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Mobridge against the rest of the dataset
At roughly 150 frost-free days, Mobridge places 35,293 of 40,283 ZIP codes in this dataset. Within SD, it ranks 169 of 378.
Learn more
Before leaning on 57601's figures: zone vs. frost date explains why Zone 4b and Mobridge's frost date answer different questions, while the frost range explains how to read the range around Mobridge's dates instead of trusting one.