Lawton, OK 73505 Frost Dates
73505, near Lawton, OK: the frost window
Typically, the last spring freeze lands around 03/26, roughly 210 days out. Fall's first freeze usually shows up around 11/07, roughly 225 days after the last spring frost.
Lawton sits in USDA Zone 7b (5 to 10°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
Lawton'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.
Why 03/26 isn't a guarantee
03/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/04 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.
Lawton against the rest of the dataset
At roughly 225 frost-free days, Lawton places 11,338 of 40,283 ZIP codes in this dataset. Within OK, it ranks 82 of 764.
Learn more
Two guides worth reading on 73505: zone vs. frost date, on why Zone 7b and Lawton's frost date answer different questions, and the frost range, on how to read the range around Lawton's dates instead of trusting one.