La Cañada Flintridge, CA 91011 Frost Dates
Frost dates for La Cañada Flintridge, CA, ZIP 91011
Around 01/08 is the usual last spring frost, about 133 days away. The first fall frost typically arrives around 01/07, about 365 frost-free days later.
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 La Cañada Flintridge, not a forecast for this year.
What to do before the first frost
Zone 10a around La Cañada Flintridge has about 19 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around La Cañada Flintridge's last frost
01/08 is the middle of 30 years of NOAA records, not a promise. Plant by 02/17 and you're betting against frost in roughly 9 years out of 10. 12/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How La Cañada Flintridge compares
La Cañada Flintridge's growing season runs about 365 days, ranking 1,473 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 757 of 2,555.
Learn more
local microclimates explains what one yard in La Cañada Flintridge can differ from the 91011 normal, and zone vs. frost date explains why Zone 10a and La Cañada Flintridge's frost date answer different questions.