Philip, SD 57553 Frost Dates
Frost dates for Philip, SD, ZIP 57553
Typically, the last spring freeze lands around 05/06, roughly 251 days out. The first fall frost typically arrives around 10/04, about 148 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 Philip, not a forecast for this year.
What to do before the first frost
Zone 4b around Philip has about 5 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.
Why 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Philip compares
About 148 days separate Philip's last and first frost, putting it 35,765 of 40,283 ZIP codes nationally. Within SD, it ranks 201 of 378.
Learn more
zone vs. frost date explains why Zone 4b and Philip's frost date answer different questions, and the frost range explains how to read the range around Philip's dates instead of trusting one.