Grandfield, OK 73546 Frost Dates
73546, near Grandfield, OK: the frost window
The last spring frost here typically falls around 03/26, about 210 days from today. Fall's first freeze usually shows up around 11/10, roughly 229 days after the last spring frost.
Grandfield sits in USDA Zone 8a (10 to 15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Grandfield's growing season runs out in roughly 11 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 Grandfield's last frost
03/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/14 and only about 1 year in 10 sees frost after that.
Grandfield against the rest of the dataset
About 229 days separate Grandfield's last and first frost, putting it 10,631 of 40,283 ZIP codes nationally. Within OK, it ranks 37 of 764.
Learn more
Two guides worth reading on 73546: the frost range, on how to read the range around Grandfield's dates instead of trusting one, and local microclimates, on what one yard in Grandfield can differ from the 73546 normal.