Lawton, OK 73501 Frost Dates
73501, near Lawton, 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 11/07, roughly 225 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lawton 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
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.
How much risk comes with planting early here
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
Lawton's growing season runs about 225 days, ranking 11,336 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 80 of 764.
Learn more
Two guides worth reading on 73501: 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.