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Millbrae, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Millbrae, a city in San Mateo County, California.

Overnight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. Southwest wind around 5 mph.

7-day forecast for Millbrae

WhenTempForecastWindPrecip
Overnight 56°F Partly Cloudy 5 mph SW 0%
Tuesday 81°F Haze then Sunny 2 to 12 mph WSW 0%
Tuesday Night 56°F Mostly Clear 3 to 10 mph SW 1%
Wednesday 80°F Sunny 3 to 10 mph WSW 0%
Wednesday Night 58°F Mostly Clear 2 to 10 mph WSW 0%
Thursday 79°F Mostly Sunny 1 to 10 mph WSW 0%
Thursday Night 58°F Mostly Clear 2 to 10 mph W 0%
Friday 82°F Sunny 2 to 12 mph W 0%
Friday Night 59°F Mostly Clear 3 to 12 mph W 0%
Saturday 79°F Sunny 2 to 12 mph WSW 0%
Saturday Night 60°F Mostly Clear 8 to 12 mph WSW 0%
Sunday 76°F Sunny 8 to 15 mph WSW 0%
Sunday Night 58°F Mostly Clear 9 to 15 mph WSW 0%
Monday 73°F Sunny 9 to 15 mph WSW 0%

Forecast source: National Weather Service (api.weather.gov) for Millbrae (37.599, -122.402). Updated through the day.

Growing snapshot for Millbrae

Last spring frost
Dec 29
First fall frost
Dec 26
Growing season
365 days
Hardiness zone
10a

More local growing data for Millbrae: nearby ZIP 94030 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, San Francisco Intl Ap, Ca (2.5 mi from Millbrae). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.