Dewar, OK 74431 Frost Dates
Frost dates for Dewar, OK, ZIP 74431
The last spring frost here typically falls around 03/24, about 208 days from today. The first fall frost typically arrives around 11/09, about 229 frost-free days later.
Zone 7b (5 to 10°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 Dewar, not a forecast for this year.
What to do before the first frost
Zone 7b around Dewar has about 10 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.
How much risk comes with planting early here
03/24 is the middle of 30 years of NOAA records, not a promise. Plant by 03/05 and you're betting against frost in roughly 9 years out of 10. 04/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dewar compares
About 229 days separate Dewar's last and first frost, putting it 10,637 of 40,283 ZIP codes nationally. Within OK, it ranks 40 of 764.
Learn more
zone vs. frost date explains why Zone 7b and Dewar's frost date answer different questions, and the frost range explains how to read the range around Dewar's dates instead of trusting one.