Mountain View, CA 94041 Frost Dates
Mountain View, CA: when does the frost end?
Typically, the last spring freeze lands around 01/06, roughly 131 days out. Fall's first freeze usually shows up around 12/23, roughly 353 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Mountain View in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 17 weeks until Mountain View's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
01/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/16 and only about 1 year in 10 sees frost after that.
Mountain View against the rest of the dataset
At roughly 353 frost-free days, Mountain View places 2,214 of 40,283 ZIP codes in this dataset. Within CA, it ranks 994 of 2,555.
Learn more
Before leaning on 94041's figures: local microclimates explains what one yard in Mountain View can differ from the 94041 normal, while zone vs. frost date explains why Zone 9b and Mountain View's frost date answer different questions.