Hennessey, OK 73742 Frost Dates
73742, near Hennessey, OK: the frost window
Around 04/11 is the usual last spring frost, about 226 days away. Fall's first freeze usually shows up around 10/31, roughly 201 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hennessey in Zone 7a (0 to 5°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
Hennessey'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.
The actual range around Hennessey's last frost
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Hennessey against the rest of the dataset
Hennessey's growing season runs about 201 days, ranking 17,531 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 639 of 764.
Learn more
Two guides worth reading on 73742: the frost range, on how to read the range around Hennessey's dates instead of trusting one, and local microclimates, on what one yard in Hennessey can differ from the 73742 normal.