Delaware, OK 74027 Frost Dates
74027, near Delaware, OK: the frost window
The last spring frost here typically falls around 04/11, about 226 days from today. Fall's first freeze usually shows up around 10/24, roughly 195 days after the last spring frost.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Delaware, not a forecast for this year.
Stretching the season past the first frost
Delaware's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/11 isn't a guarantee
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Delaware against the rest of the dataset
About 195 days separate Delaware's last and first frost, putting it 19,356 of 40,283 ZIP codes nationally. Within OK, it ranks 714 of 764.
Learn more
Two guides worth reading on 74027: the frost range, on how to read the range around Delaware's dates instead of trusting one, and local microclimates, on what one yard in Delaware can differ from the 74027 normal.