Tulsa, OK 74114 Frost Dates
Frost dates for Tulsa, OK, ZIP 74114
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.
Tulsa 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 Tulsa 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.
The actual range around Tulsa's last frost
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 Tulsa compares
At roughly 220 frost-free days, Tulsa places 12,663 of 40,283 ZIP codes in this dataset. Within OK, it ranks 148 of 764.
Learn more
local microclimates explains what one yard in Tulsa can differ from the 74114 normal, and zone vs. frost date explains why Zone 7b and Tulsa's frost date answer different questions.