Blair, OK 73526 Frost Dates
73526, near Blair, OK: the frost window
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 10/29, roughly 201 days after the last spring frost.
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 Blair, not a forecast for this year.
Stretching the season past the first frost
Blair's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Blair against the rest of the dataset
Blair's growing season runs about 201 days, ranking 17,607 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 645 of 764.
Learn more
Two guides worth reading on 73526: local microclimates, on what one yard in Blair can differ from the 73526 normal, and zone vs. frost date, on why Zone 7b and Blair's frost date answer different questions.