Rattan, OK 74543 Frost Dates
74543, near Rattan, OK: the frost window
Typically, the last spring freeze lands around 04/02, roughly 217 days out. Fall's first freeze usually shows up around 11/01, roughly 212 days after the last spring frost.
Rattan sits in USDA Zone 8a (10 to 15°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
Rattan'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.
The actual range around Rattan's last frost
04/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/20 and only about 1 year in 10 sees frost after that.
Rattan against the rest of the dataset
Rattan's growing season runs about 212 days, ranking 14,680 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 435 of 764.
Learn more
Two guides worth reading on 74543: local microclimates, on what one yard in Rattan can differ from the 74543 normal, and zone vs. frost date, on why Zone 8a and Rattan's frost date answer different questions.