Novato, CA 94915 Frost Dates
94915, near Novato, CA: the frost window
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.
Zone 9b (25 to 30°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 Novato, not a forecast for this year.
Stretching the season past the first frost
Novato's growing season runs out in roughly 16 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 01/11 isn't a guarantee
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.
Novato against the rest of the dataset
At roughly 349 frost-free days, Novato places 2,328 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,034 of 2,555.
Learn more
Two guides worth reading on 94915: the frost range, on how to read the range around Novato's dates instead of trusting one, and local microclimates, on what one yard in Novato can differ from the 94915 normal.