Fairfax, CA 94933 Frost Dates
Fairfax, CA: when does the frost end?
Around 01/11 is the usual last spring frost, about 136 days away. Fall's first freeze usually shows up around 12/21, roughly 349 days after the last spring frost.
Fairfax 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.
Stretching the season past the first frost
With roughly 16 weeks until Fairfax's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Fairfax's last frost
01/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/25 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.
Fairfax against the rest of the dataset
At roughly 349 frost-free days, Fairfax places 2,350 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,056 of 2,555.
Learn more
Before leaning on 94933's figures: local microclimates explains what one yard in Fairfax can differ from the 94933 normal, while zone vs. frost date explains why Zone 10a and Fairfax's frost date answer different questions.