Dewey, OK 74029 Frost Dates
Frost dates for Dewey, OK, ZIP 74029
Typically, the last spring freeze lands around 04/11, roughly 226 days out. The first fall frost typically arrives around 10/24, about 195 frost-free days later.
Dewey sits in USDA Zone 7a (0 to 5°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.
What to do before the first frost
Zone 7a around Dewey has about 8 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 04/11 isn't a guarantee
04/11 is the middle of 30 years of NOAA records, not a promise. Plant by 03/27 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dewey compares
At roughly 195 frost-free days, Dewey places 19,276 of 40,283 ZIP codes in this dataset. Within OK, it ranks 710 of 764.
Learn more
zone vs. frost date explains why Zone 7a and Dewey's frost date answer different questions, and the frost range explains how to read the range around Dewey's dates instead of trusting one.