Cornish, OK 73456 Frost Dates
73456, near Cornish, OK: the frost window
Typically, the last spring freeze lands around 04/06, roughly 221 days out. Fall's first freeze usually shows up around 11/01, roughly 204 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Cornish in Zone 8a (10 to 15°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
Cornish'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 Cornish's last frost
04/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/25 and only about 1 year in 10 sees frost after that.
Cornish against the rest of the dataset
About 204 days separate Cornish's last and first frost, putting it 16,793 of 40,283 ZIP codes nationally. Within OK, it ranks 615 of 764.
Learn more
Two guides worth reading on 73456: local microclimates, on what one yard in Cornish can differ from the 73456 normal, and zone vs. frost date, on why Zone 8a and Cornish's frost date answer different questions.