Millbrae, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Millbrae, a city in San Mateo County, California.
This Afternoon
72°F
Sunny
Sunny. High near 72, with temperatures falling to around 68 in the afternoon. West wind 10 to 15 mph, with gusts as high as 22 mph.
7-day forecast for Millbrae
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Sunny | 10 to 15 mph W | 0% |
| Tonight | 57°F | Partly Cloudy | 5 to 15 mph W | 1% |
| Saturday | 74°F | Mostly Sunny | 3 to 14 mph W | 0% |
| Saturday Night | 57°F | Mostly Cloudy | 7 to 14 mph W | 2% |
| Sunday | 69°F | Partly Sunny | 7 to 12 mph W | 3% |
| Sunday Night | 58°F | Mostly Cloudy | 5 to 12 mph W | 3% |
| Monday | 71°F | Mostly Sunny | 5 to 12 mph WSW | 1% |
| Monday Night | 57°F | Partly Cloudy | 5 to 12 mph WSW | 0% |
| Tuesday | 74°F | Mostly Sunny | 3 to 10 mph WSW | 0% |
| Tuesday Night | 56°F | Mostly Clear | 2 to 10 mph WSW | 0% |
| Wednesday | 82°F | Sunny | 1 to 9 mph WSW | 0% |
| Wednesday Night | 59°F | Mostly Clear | 0 to 9 mph SW | 0% |
| Thursday | 83°F | Sunny | 0 to 10 mph WSW | 0% |
| Thursday Night | 60°F | Partly Cloudy | 3 to 10 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 Sep 19, 2026.