National Weather Service United States Department of Commerce

Unsettled weather in store for eastern U.S. into weekend

A complex weather system moving across the eastern U.S. will bring a variety of hazardous weather to the region on Friday and into the weekend. Much colder weather is expected by Saturday, along with numerous showers and accumulating snow in the higher elevations of the Appalachians. Rain and snow will move into northern New England on Sunday.
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Current Conditions

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San Bruno CA

7 Day Forecast

This
Afternoon

Showers Chance for Measurable Precipitation 100%

Showers

High: 18 °C

Tonight

Showers Likely Chance for Measurable Precipitation 70%

Showers
Likely

Low: 12 °C

Saturday

Chance Showers Chance for Measurable Precipitation 40%

Chance
Showers

High: 18 °C

Saturday
Night

Patchy Fog

Patchy
Fog

Low: 11 °C

Sunday

Patchy Fog

Patchy
Fog

High: 18 °C

Sunday
Night

Mostly Clear

Mostly
Clear

Low: 12 °C

Monday

Mostly Sunny

Mostly
Sunny

High: 18 °C

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 12 °C

Tuesday

Mostly Sunny

Mostly
Sunny

High: 19 °C

Detailed Forecast

  • This Afternoon Showers and possibly a thunderstorm. High near 18. West northwest wind around 29 km/h, with gusts as high as 40 km/h. Chance of precipitation is 100%.
  • Tonight Showers likely and possibly a thunderstorm. Some of the storms could produce small hail. Cloudy, with a low around 12. West northwest wind 19 to 24 km/h decreasing to 13 to 18 km/h after midnight. Winds could gust as high as 35 km/h. Chance of precipitation is 70%.
  • Saturday A 40 percent chance of showers, mainly before 11am. Partly sunny, with a high near 18. Light and variable wind becoming west northwest 11 to 16 km/h in the afternoon.
  • Saturday Night Patchy fog after 11pm. Otherwise, mostly clear, with a low around 11. North wind 16 to 21 km/h decreasing to 8 to 13 km/h after midnight. Winds could gust as high as 29 km/h.
  • Sunday Patchy fog before 8am. Otherwise, sunny, with a high near 18. Calm wind.
  • Sunday Night Mostly clear, with a low around 12.
  • Monday Mostly sunny, with a high near 18.
  • Monday Night Partly cloudy, with a low around 12.
  • Tuesday Mostly sunny, with a high near 19.
  • Tuesday Night Partly cloudy, with a low around 13.
  • Wednesday Mostly sunny, with a high near 22.
  • Wednesday Night Partly cloudy, with a low around 14.
  • Thursday Mostly sunny, with a high near 21.