Broken Arrow, OK 74101 Frost Dates
Frost dates for Broken Arrow, OK, ZIP 74101
Typically, the last spring freeze lands around 04/01, roughly 216 days out. The first fall frost typically arrives around 11/01, about 212 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 Broken Arrow, not a forecast for this year.
What to do before the first frost
Zone 7b around Broken Arrow has about 9 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 04/01 isn't a guarantee
04/01 is the middle of 30 years of NOAA records, not a promise. Plant by 03/12 and you're betting against frost in roughly 9 years out of 10. 04/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Broken Arrow compares
At roughly 212 frost-free days, Broken Arrow places 14,556 of 40,283 ZIP codes in this dataset. Within OK, it ranks 413 of 764.
Learn more
the frost range explains how to read the range around Broken Arrow's dates instead of trusting one, and local microclimates explains what one yard in Broken Arrow can differ from the 74101 normal.