See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
14°
Clear
Feels Like: 22°
Min: 13°
Max: 21°
The next few hours will be clear, with today reaching 21°C and dropping to 15°C. The coming days will be partly cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:57
Sunrise
19:10
Sunset
Moon
Waxing Crescent
11:44
Moonrise
20:55
Moonset
Daily Forecast
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Wednesday
Thursday
Friday
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Thursday
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Weather in San Bruno today, September 15, 2026
San Bruno keeps a mostly sunny profile on September 15, 2026, aside from a cloudier spell around 22:00. Outside that window, bright conditions should still lead the day. Morning skies stay relatively clear, holding cloud close to 4% near 10:00. The early part of the day favours being outside.
Temperatures climb from an overnight low near 13°C toward a daytime high of about 21°C. Moisture in the air spans 60%-91%, with the highest values around 20:00. Winds stay light, near 6.8 km/h by 16:00, so the day feels still more than breezy.
Later hours favour clearer intervals, as cloud stays near 31% around 22:00. The afternoon is the better half for outdoor time. Visibility stays generally good near 15.9 km on average, though it can drop toward 14.1 km in thicker cloud or showers. The sun rises at 06:57 and sets at 19:10, for a total of 12 hours 13 minutes of sunlight today.
In short, September 15, 2026 looks like a fine day in San Bruno for being outside, peaking around 21°C.
Frequently asked questions about weather in San Bruno
How warm does it get in San Bruno?
The warmest month in San Bruno is September, with average high temperatures of 20°C. The average temperature during this period is around 17°C.
How cold does it get in San Bruno?
The coldest month in San Bruno is December, with average low temperatures of 9°C. The average temperature during this period is around 11°C.
What is the wettest time of year in San Bruno?
The wettest month in San Bruno is January, with an average of 119mm of precipitation.
What is the driest time of year in San Bruno?
The driest month in San Bruno is August, with an average of 1mm of precipitation.
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