Oklahoma City, OK 73102 Frost Dates
Oklahoma City, OK: when does the frost end?
Around 04/04 is the usual last spring frost, about 219 days away. Fall's first freeze usually shows up around 11/02, roughly 213 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 9 weeks until Oklahoma City's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/04 isn't a guarantee
04/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/20 and only about 1 year in 10 sees frost after that.
Oklahoma City against the rest of the dataset
Oklahoma City's growing season runs about 213 days, ranking 14,398 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 388 of 764.
Learn more
Before leaning on 73102's figures: zone vs. frost date explains why Zone 7b and Oklahoma City's frost date answer different questions, while the frost range explains how to read the range around Oklahoma City's dates instead of trusting one.