Burbank, CA 91040 Frost Dates
91040, near Burbank, CA: the frost window
The last spring frost here typically falls around 12/31, about 125 days from today. Fall's first freeze usually shows up around 12/28, roughly 365 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 Burbank, not a forecast for this year.
Stretching the season past the first frost
Burbank's growing season runs out in roughly 17 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 12/31 isn't a guarantee
12/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/12 and only about 1 year in 10 sees frost after that.
Burbank against the rest of the dataset
Burbank's growing season runs about 365 days, ranking 489 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 205 of 2,555.
Learn more
Two guides worth reading on 91040: local microclimates, on what one yard in Burbank can differ from the 91040 normal, and zone vs. frost date, on why Zone 10a and Burbank's frost date answer different questions.