Colony, OK 73021 Frost Dates
73021, near Colony, OK: the frost window
Around 04/06 is the usual last spring frost, about 221 days away. Fall's first freeze usually shows up around 10/31, roughly 206 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Colony 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
Colony's growing season runs out in roughly 9 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
04/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/22 and only about 1 year in 10 sees frost after that.
Colony against the rest of the dataset
At roughly 206 frost-free days, Colony places 16,146 of 40,283 ZIP codes in this dataset. Within OK, it ranks 572 of 764.
Learn more
Two guides worth reading on 73021: local microclimates, on what one yard in Colony can differ from the 73021 normal, and zone vs. frost date, on why Zone 7b and Colony's frost date answer different questions.