Broken Arrow, OK 74133 Frost Dates
Broken Arrow, OK: when does the frost end?
Around 04/01 is the usual last spring frost, about 216 days away. Fall's first freeze usually shows up around 11/01, roughly 212 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Broken Arrow 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 Broken Arrow's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/12 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.
Broken Arrow against the rest of the dataset
Broken Arrow's growing season runs about 212 days, ranking 14,558 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 415 of 764.
Learn more
Before leaning on 74133's figures: zone vs. frost date explains why Zone 7b and Broken Arrow's frost date answer different questions, while the frost range explains how to read the range around Broken Arrow's dates instead of trusting one.