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Weather in San Bruno, CA · National Weather Service + NOAA

It hardly ever freezes in San Bruno

San Bruno has warm winters and cool summers. A typical July afternoon reaches 70°, a January night drops to 44°, and snow is almost unheard of. A typical November afternoon reaches 63°, and nights fall to 48°.

Winter 58°/45°Spring 63°/48°Summer 70°/54°Fall 68°/51°
Right now
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Sunrise 6:36 am · sunset 5:10 pm

Getting the latest forecast from the National Weather Service…

What stands out about San Bruno’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
It hardly ever freezesOnly 20% of years see a night at 32° or below.Cool summersJuly afternoons average 70°, cooler than 99% of U.S. towns.Snow is rareNo measurable snow in a normal year.
A normal year

Where today sits in San Bruno’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
58° / 45°
Snow is rare
Spring
63° / 48°
Frost is rare by spring
Summer
70° / 54°
2 days reach 90° in a normal year
Fall now
68° / 51°
Mild well into the fall
Best months to be outside
AprMayJunJulAugSepOctNov
Highs of 62–84° and lows of 40° or more
How much snow does San Bruno get?Almost none.When is it wettest?December, with 5.1 inches.Is it warmer than it used to be?+1.6° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in San Bruno.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for San Bruno itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Pacifica 4 Sse, CA (3 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.