Coalgate, OK 74538 Frost Dates
74538, near Coalgate, OK: the frost window
Around 03/31 is the usual last spring frost, about 215 days away. Fall's first freeze usually shows up around 11/04, roughly 219 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 Coalgate, not a forecast for this year.
Stretching the season past the first frost
Coalgate'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.
How much risk comes with planting early here
03/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/09 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.
Coalgate against the rest of the dataset
Coalgate's growing season runs about 219 days, ranking 13,045 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 222 of 764.
Learn more
Two guides worth reading on 74538: the frost range, on how to read the range around Coalgate's dates instead of trusting one, and local microclimates, on what one yard in Coalgate can differ from the 74538 normal.