Azusa, CA 91702 Frost Dates
Azusa, 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 Azusa in Zone 9b (25 to 30°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 Azusa's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Azusa's last frost
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.
Azusa against the rest of the dataset
At roughly 354 frost-free days, Azusa places 2,174 of 40,283 ZIP codes in this dataset. Within CA, it ranks 978 of 2,555.
Learn more
Before leaning on 91702's figures: the frost range explains how to read the range around Azusa's dates instead of trusting one, while local microclimates explains what one yard in Azusa can differ from the 91702 normal.