Millbrae, CA Weather & Growing Conditions
This Afternoon
64°F
Chance Light Rain
A chance of rain. Partly sunny. High near 64, with temperatures falling to around 58 in the afternoon. South southwest wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Chance Light Rain | 6 mph SSW | 48% |
| Tonight | 51°F | Chance Light Rain then Mostly Cloudy | 6 to 9 mph ESE | 37% |
| Wednesday | 65°F | Sunny | 5 to 16 mph NNE | 3% |
| Wednesday Night | 53°F | Mostly Cloudy | 2 to 16 mph NW | 0% |
| Thursday | 68°F | Sunny | 2 to 8 mph NNW | 0% |
| Thursday Night | 53°F | Mostly Clear | 2 to 9 mph NNW | 0% |
| Friday | 71°F | Sunny | 1 to 6 mph N | 0% |
| Friday Night | 54°F | Clear | 1 to 6 mph N | 0% |
| Saturday | 75°F | Sunny | 5 mph NNE | 0% |
| Saturday Night | 55°F | Mostly Clear | 3 to 7 mph NW | 0% |
| Sunday | 72°F | Mostly Sunny | 2 to 7 mph NNW | 0% |
| Sunday Night | 55°F | Partly Cloudy | 2 to 7 mph NW | 0% |
| Monday | 70°F | Partly Sunny | 2 to 8 mph NW | 1% |
| Monday Night | 55°F | Partly Cloudy | 2 to 8 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Millbrae, CA
Last spring frost
Dec 29
First fall frost
Dec 26
Growing season
365 days
Hardiness zone
10a
Explore more for Millbrae, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, San Francisco Intl Ap, Ca (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.