Piedmont, OK 73078 Frost Dates
73078, near Piedmont, OK: the frost window
Around 04/02 is the usual last spring frost, about 217 days away. Fall's first freeze usually shows up around 11/04, roughly 216 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Piedmont 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
Piedmont's growing season runs out in roughly 10 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 Piedmont's last frost
04/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/18 and only about 1 year in 10 sees frost after that.
Piedmont against the rest of the dataset
At roughly 216 frost-free days, Piedmont places 13,763 of 40,283 ZIP codes in this dataset. Within OK, it ranks 320 of 764.
Learn more
Two guides worth reading on 73078: zone vs. frost date, on why Zone 7b and Piedmont's frost date answer different questions, and the frost range, on how to read the range around Piedmont's dates instead of trusting one.