May, OK 73851 Frost Dates
May, OK: when does the frost end?
The last spring frost here typically falls around 04/17, about 232 days from today. Fall's first freeze usually shows up around 10/20, roughly 185 days after the last spring frost.
May sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 8 weeks until May's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around May's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 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.
May against the rest of the dataset
About 185 days separate May's last and first frost, putting it 23,371 of 40,283 ZIP codes nationally. Within OK, it ranks 754 of 764.
Learn more
Before leaning on 73851's figures: the frost range explains how to read the range around May's dates instead of trusting one, while local microclimates explains what one yard in May can differ from the 73851 normal.