Oklahoma City, OK 73103 Frost Dates
Frost dates for Oklahoma City, OK, ZIP 73103
Around 04/02 is the usual last spring frost, about 217 days away. The first fall frost typically arrives around 11/04, about 216 frost-free days later.
The USDA Plant Hardiness Zone Map puts Oklahoma City in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7b around Oklahoma City 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 Oklahoma City's last frost
04/02 is the middle of 30 years of NOAA records, not a promise. Plant by 03/14 and you're betting against frost in roughly 9 years out of 10. 04/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oklahoma City compares
Oklahoma City's growing season runs about 216 days, ranking 13,665 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 302 of 764.
Learn more
zone vs. frost date explains why Zone 7b and Oklahoma City's frost date answer different questions, and the frost range explains how to read the range around Oklahoma City's dates instead of trusting one.