Tiburon, CA 94920 Frost Dates
Tiburon, CA: when does the frost end?
Typically, the last spring freeze lands around 01/04, roughly 129 days out. Fall's first freeze usually shows up around 01/02, roughly 365 days after the last spring frost.
Tiburon 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 18 weeks until Tiburon's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/04 isn't a guarantee
01/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/26 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.
Tiburon against the rest of the dataset
At roughly 365 frost-free days, Tiburon places 1,741 of 40,283 ZIP codes in this dataset. Within CA, it ranks 854 of 2,555.
Learn more
Before leaning on 94920's figures: zone vs. frost date explains why Zone 10a and Tiburon's frost date answer different questions, while the frost range explains how to read the range around Tiburon's dates instead of trusting one.