Covina, CA 91722 Frost Dates
Covina, CA: when does the frost end?
Around 01/08 is the usual last spring frost, about 133 days away. Fall's first freeze usually shows up around 12/28, roughly 354 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Covina in Zone 10a (30 to 35°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 17 weeks until Covina's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/08 isn't a guarantee
01/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/14 and only about 1 year in 10 sees frost after that.
Covina against the rest of the dataset
About 354 days separate Covina's last and first frost, putting it 2,171 of 40,283 ZIP codes nationally. Within CA, it ranks 975 of 2,555.
Learn more
Before leaning on 91722's figures: local microclimates explains what one yard in Covina can differ from the 91722 normal, while zone vs. frost date explains why Zone 10a and Covina's frost date answer different questions.