Glendale, CA 91203 Frost Dates
Glendale, CA: when does the frost end?
Typically, the last spring freeze lands around 01/02, roughly 127 days out. Fall's first freeze usually shows up around 12/26, roughly 364 days after the last spring frost.
Zone 10a (30 to 35°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Glendale, not a forecast for this year.
Stretching the season past the first frost
With roughly 17 weeks until Glendale'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
01/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/11 and only about 1 year in 10 sees frost after that.
Glendale against the rest of the dataset
About 364 days separate Glendale's last and first frost, putting it 2,024 of 40,283 ZIP codes nationally. Within CA, it ranks 915 of 2,555.
Learn more
Before leaning on 91203's figures: the frost range explains how to read the range around Glendale's dates instead of trusting one, while local microclimates explains what one yard in Glendale can differ from the 91203 normal.