Ralston, OK 74650 Frost Dates
74650, near Ralston, OK: the frost window
The last spring frost here typically falls around 04/06, about 221 days from today. Fall's first freeze usually shows up around 10/29, roughly 204 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 Ralston, not a forecast for this year.
Stretching the season past the first frost
Ralston'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 Ralston's last frost
04/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/23 and only about 1 year in 10 sees frost after that.
Ralston against the rest of the dataset
Ralston's growing season runs about 204 days, ranking 16,766 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 610 of 764.
Learn more
Two guides worth reading on 74650: zone vs. frost date, on why Zone 7a and Ralston's frost date answer different questions, and the frost range, on how to read the range around Ralston's dates instead of trusting one.