Chelsea, OK 74016 Frost Dates
74016, near Chelsea, OK: the frost window
Typically, the last spring freeze lands around 04/07, roughly 222 days out. Fall's first freeze usually shows up around 10/30, roughly 205 days after the last spring frost.
Chelsea sits in USDA Zone 7a (0 to 5°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
Chelsea'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.
Why 04/07 isn't a guarantee
04/07 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 04/24 and only about 1 year in 10 sees frost after that.
Chelsea against the rest of the dataset
Chelsea's growing season runs about 205 days, ranking 16,325 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 579 of 764.
Learn more
Two guides worth reading on 74016: zone vs. frost date, on why Zone 7a and Chelsea's frost date answer different questions, and the frost range, on how to read the range around Chelsea's dates instead of trusting one.