Lima, OK 74818 Frost Dates
Lima, OK: when does the frost end?
Typically, the last spring freeze lands around 03/30, roughly 214 days out. Fall's first freeze usually shows up around 11/05, roughly 221 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lima in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 10 weeks until Lima's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
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 04/16 and only about 1 year in 10 sees frost after that.
Lima against the rest of the dataset
Lima's growing season runs about 221 days, ranking 12,614 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 140 of 764.
Learn more
Before leaning on 74818's figures: zone vs. frost date explains why Zone 7b and Lima's frost date answer different questions, while the frost range explains how to read the range around Lima's dates instead of trusting one.