Glenpool, OK 74033 Frost Dates
74033, near Glenpool, OK: the frost window
The last spring frost here typically falls around 03/30, about 214 days from today. Fall's first freeze usually shows up around 11/04, roughly 220 days after the last spring frost.
Zone 7b (5 to 10°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 Glenpool, not a forecast for this year.
Stretching the season past the first frost
Glenpool'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.
Why 03/30 isn't a guarantee
03/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/17 and only about 1 year in 10 sees frost after that.
Glenpool against the rest of the dataset
At roughly 220 frost-free days, Glenpool places 12,755 of 40,283 ZIP codes in this dataset. Within OK, it ranks 192 of 764.
Learn more
Two guides worth reading on 74033: the frost range, on how to read the range around Glenpool's dates instead of trusting one, and local microclimates, on what one yard in Glenpool can differ from the 74033 normal.