Newell, SD 57788 Frost Dates
Newell, SD: when does the frost end?
The last spring frost here typically falls around 05/08, about 253 days from today. Fall's first freeze usually shows up around 10/01, roughly 144 days after the last spring frost.
Newell sits in USDA Zone 4b (-25 to -20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 5 weeks until Newell's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/08 isn't a guarantee
05/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Newell against the rest of the dataset
Newell's growing season runs about 144 days, ranking 36,431 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 257 of 378.
Learn more
Before leaning on 57788's figures: local microclimates explains what one yard in Newell can differ from the 57788 normal, while zone vs. frost date explains why Zone 4b and Newell's frost date answer different questions.