Alva, OK 73717 Frost Dates
Alva, OK: when does the frost end?
Around 04/15 is the usual last spring frost, about 230 days away. Fall's first freeze usually shows up around 10/29, roughly 196 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Alva in Zone 7a (0 to 5°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 9 weeks until Alva's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Alva's last frost
04/15 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 04/28 and only about 1 year in 10 sees frost after that.
Alva against the rest of the dataset
About 196 days separate Alva's last and first frost, putting it 18,958 of 40,283 ZIP codes nationally. Within OK, it ranks 694 of 764.
Learn more
Before leaning on 73717's figures: local microclimates explains what one yard in Alva can differ from the 73717 normal, while zone vs. frost date explains why Zone 7a and Alva's frost date answer different questions.