Eagle Butte, SD 57625 Frost Dates
Eagle Butte, SD: when does the frost end?
The last spring frost here typically falls around 05/06, about 251 days from today. Fall's first freeze usually shows up around 10/02, roughly 148 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 Eagle Butte, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Eagle Butte's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Eagle Butte's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 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.
Eagle Butte against the rest of the dataset
Eagle Butte's growing season runs about 148 days, ranking 35,739 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 199 of 378.
Learn more
Before leaning on 57625's figures: local microclimates explains what one yard in Eagle Butte can differ from the 57625 normal, while zone vs. frost date explains why Zone 4b and Eagle Butte's frost date answer different questions.