Eldorado, OK 73537 Frost Dates
Eldorado, OK: when does the frost end?
Typically, the last spring freeze lands around 04/04, roughly 219 days out. Fall's first freeze usually shows up around 11/01, roughly 210 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 Eldorado, not a forecast for this year.
Stretching the season past the first frost
With roughly 9 weeks until Eldorado's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/04 isn't a guarantee
04/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/22 and only about 1 year in 10 sees frost after that.
Eldorado against the rest of the dataset
Eldorado's growing season runs about 210 days, ranking 15,110 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 487 of 764.
Learn more
Before leaning on 73537's figures: zone vs. frost date explains why Zone 7b and Eldorado's frost date answer different questions, while the frost range explains how to read the range around Eldorado's dates instead of trusting one.