Newell, SD 57787 Frost Dates
Frost dates for Newell, SD, ZIP 57787
The last spring frost here typically falls around 05/13, about 258 days from today. The first fall frost typically arrives around 09/28, about 136 frost-free days later.
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 Newell, not a forecast for this year.
What to do before the first frost
Zone 4b around Newell has about 4 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Newell's last frost
05/13 is the middle of 30 years of NOAA records, not a promise. Plant by 05/02 and you're betting against frost in roughly 9 years out of 10. 05/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Newell compares
Newell's growing season runs about 136 days, ranking 37,749 of 40,283 US ZIP codes measured here, longest to shortest. Within SD, it ranks 349 of 378.
Learn more
the frost range explains how to read the range around Newell's dates instead of trusting one, and local microclimates explains what one yard in Newell can differ from the 57787 normal.