National Weather Service United States Department of Commerce

Unseasonably cold temperatures spreading into central U.S.

A strong cold front will usher a much colder air mass into the central and eastern U.S. for the end of the work week. Temperatures will be 10 to 20 degrees below average in some areas. Rain and snow will be possible across the Great Lakes on Friday as the system crosses the area. Heavy snow is possible in the central Appalachians Friday night.
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Current Conditions

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San Bruno CA

7 Day Forecast

Overnight

Chance Rain Chance for Measurable Precipitation 30%

Chance
Rain

Low: 17 °C

Friday

Showers Chance for Measurable Precipitation 80%

Showers

High: 18 °C

Friday
Night

Showers Chance for Measurable Precipitation 80%

Showers

Low: 12 °C

Saturday

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

High: 18 °C

Saturday
Night

Patchy Fog

Patchy
Fog

Low: 11 °C

Sunday

Patchy Fog

Patchy
Fog

High: 19 °C

Sunday
Night

Mostly Clear

Mostly
Clear

Low: 12 °C

Monday

Sunny

Sunny

High: 20 °C

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 11 °C

Detailed Forecast

  • Overnight A 30 percent chance of rain. Cloudy, with a steady temperature around -8. Southwest wind around 8 km/h.
  • Friday Showers. High near 18. South southeast wind 10 to 18 km/h becoming west in the morning. Chance of precipitation is 80%.
  • Friday Night Showers and possibly a thunderstorm before 11pm, then showers likely. Some of the storms could produce small hail. Low around 12. West northwest wind 10 to 16 km/h. Chance of precipitation is 80%.
  • Saturday A 30 percent chance of showers, mainly before 11am. Partly sunny, with a high near 18. West wind 23 to 27 km/h, with gusts as high as 37 km/h.
  • Saturday Night Patchy fog after 11pm. Otherwise, mostly clear, with a low around 11. North northwest wind 16 to 21 km/h decreasing to 10 to 15 km/h in the evening. Winds could gust as high as 29 km/h.
  • Sunday Patchy fog before 11am. Otherwise, sunny, with a high near 19.
  • Sunday Night Mostly clear, with a low around 12.
  • Monday Sunny, with a high near 20.
  • Monday Night Partly cloudy, with a low around 11.
  • Tuesday Mostly sunny, with a high near 21.
  • 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 13.
  • Thursday Mostly sunny, with a high near 22.