Heavener, OK 74939 Frost Dates
Frost dates for Heavener, OK, ZIP 74939
The last spring frost here typically falls around 04/06, about 221 days from today. The first fall frost typically arrives around 11/02, about 210 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 Heavener, not a forecast for this year.
What to do before the first frost
Zone 7b around Heavener 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.
The actual range around Heavener's last frost
04/06 is the middle of 30 years of NOAA records, not a promise. Plant by 03/18 and you're betting against frost in roughly 9 years out of 10. 04/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Heavener compares
At roughly 210 frost-free days, Heavener places 15,019 of 40,283 ZIP codes in this dataset. Within OK, it ranks 468 of 764.
Learn more
the frost range explains how to read the range around Heavener's dates instead of trusting one, and local microclimates explains what one yard in Heavener can differ from the 74939 normal.