Mountain View, CA 94043 Frost Dates
94043, near Mountain View, CA: the frost window
The last spring frost here typically falls around 01/06, about 131 days from today. Fall's first freeze usually shows up around 12/23, roughly 353 days after the last spring frost.
Zone 10a (30 to 35°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 Mountain View, not a forecast for this year.
Stretching the season past the first frost
Mountain View's growing season runs out in roughly 17 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Mountain View's last frost
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
About 353 days separate Mountain View's last and first frost, putting it 2,215 of 40,283 ZIP codes nationally. Within CA, it ranks 995 of 2,555.
Learn more
Two guides worth reading on 94043: local microclimates, on what one yard in Mountain View can differ from the 94043 normal, and zone vs. frost date, on why Zone 10a and Mountain View's frost date answer different questions.