Owasso, OK 74117 Frost Dates
Frost dates for Owasso, OK, ZIP 74117
Typically, the last spring freeze lands around 03/31, roughly 215 days out. The first fall frost typically arrives around 11/04, about 220 frost-free days later.
Owasso sits in USDA Zone 7b (5 to 10°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 7b around Owasso 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
03/31 is the middle of 30 years of NOAA records, not a promise. Plant by 03/11 and you're betting against frost in roughly 9 years out of 10. 04/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Owasso compares
About 220 days separate Owasso's last and first frost, putting it 12,681 of 40,283 ZIP codes nationally. Within OK, it ranks 159 of 764.
Learn more
local microclimates explains what one yard in Owasso can differ from the 74117 normal, and zone vs. frost date explains why Zone 7b and Owasso's frost date answer different questions.