Lamont, OK 74643 Frost Dates
74643, near Lamont, OK: the frost window
Typically, the last spring freeze lands around 04/18, roughly 233 days out. Fall's first freeze usually shows up around 10/20, roughly 183 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 Lamont, not a forecast for this year.
Stretching the season past the first frost
Lamont'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.
The actual range around Lamont's last frost
04/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Lamont against the rest of the dataset
At roughly 183 frost-free days, Lamont places 24,017 of 40,283 ZIP codes in this dataset. Within OK, it ranks 757 of 764.
Learn more
Two guides worth reading on 74643: the frost range, on how to read the range around Lamont's dates instead of trusting one, and local microclimates, on what one yard in Lamont can differ from the 74643 normal.