Port Hueneme, CA 91319 Frost Dates
Frost dates for Port Hueneme, CA, ZIP 91319
Typically, the last spring freeze lands around 12/29, roughly 123 days out. The first fall frost typically arrives around 12/24, about 365 frost-free days later.
Port Hueneme sits in USDA Zone 10a (30 to 35°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 10a around Port Hueneme has about 17 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.
How much risk comes with planting early here
12/29 is the middle of 30 years of NOAA records, not a promise. Plant by 01/15 and you're betting against frost in roughly 9 years out of 10. 12/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Port Hueneme compares
Port Hueneme's growing season runs about 365 days, ranking 1,205 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 523 of 2,555.
Learn more
local microclimates explains what one yard in Port Hueneme can differ from the 91319 normal, and zone vs. frost date explains why Zone 10a and Port Hueneme's frost date answer different questions.