Fort Towson, OK 74761 Frost Dates
74761, near Fort Towson, OK: the frost window
Typically, the last spring freeze lands around 03/20, roughly 204 days out. Fall's first freeze usually shows up around 11/10, roughly 233 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Fort Towson 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
Fort Towson'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.
How much risk comes with planting early here
03/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/11 and only about 1 year in 10 sees frost after that.
Fort Towson against the rest of the dataset
Fort Towson's growing season runs about 233 days, ranking 9,964 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 27 of 764.
Learn more
Two guides worth reading on 74761: zone vs. frost date, on why Zone 8a and Fort Towson's frost date answer different questions, and the frost range, on how to read the range around Fort Towson's dates instead of trusting one.