Lamar, OK 74850 Frost Dates
Lamar, OK: when does the frost end?
Typically, the last spring freeze lands around 03/31, roughly 215 days out. Fall's first freeze usually shows up around 11/03, roughly 216 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 Lamar, not a forecast for this year.
Stretching the season past the first frost
With roughly 10 weeks until Lamar's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Lamar's last frost
03/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/18 and only about 1 year in 10 sees frost after that.
Lamar against the rest of the dataset
About 216 days separate Lamar's last and first frost, putting it 13,935 of 40,283 ZIP codes nationally. Within OK, it ranks 358 of 764.
Learn more
Before leaning on 74850's figures: zone vs. frost date explains why Zone 7b and Lamar's frost date answer different questions, while the frost range explains how to read the range around Lamar's dates instead of trusting one.