National Weather Service United States Department of Commerce

Heavy rain forecast for Pacific Northwest this week

A cold front moving onshore along the Pacific Northwest and northern California coast will bring heavy rain to the region through the first part of the week. A second cold front expected to move onshore by late Tuesday, bringing additional rain and higher-elevation snow to the region.
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Current Conditions

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Castro Valley CA

7 Day Forecast

Late
Afternoon

Chance Showers Chance for Measurable Precipitation 40%

Chance
Showers

High: 70 °F

Tonight

Slight Chance Showers Chance for Measurable Precipitation 20%

Slight Chc
Showers

Low: 51 °F

Tuesday

Sunny

Sunny

High: 70 °F

Tuesday
Night

Increasing Clouds

Increasing
Clouds

Low: 51 °F

Wednesday

Mostly Sunny

Mostly
Sunny

High: 73 °F

Wednesday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 55 °F

Thursday

Partly Sunny

Partly
Sunny

High: 75 °F

Thursday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 56 °F

Friday

Mostly Sunny

Mostly
Sunny

High: 75 °F

Detailed Forecast

  • Late Afternoon A 40 percent chance of showers. Partly sunny, with a high near 70. West southwest wind around 7 mph.
  • Tonight A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 51. West wind 6 to 11 mph becoming light north northwest in the evening.
  • Tuesday Sunny, with a high near 70. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
  • Tuesday Night Increasing clouds, with a low around 51. West wind 5 to 9 mph becoming calm in the evening.
  • Wednesday Mostly sunny, with a high near 73. Light and variable wind.
  • Wednesday Night Mostly cloudy, with a low around 55.
  • Thursday Partly sunny, with a high near 75.
  • Thursday Night Mostly cloudy, with a low around 56.
  • Friday Mostly sunny, with a high near 75.
  • Friday Night A chance of rain. Mostly cloudy, with a low around 56.
  • Saturday A chance of rain. Partly sunny, with a high near 71.
  • Saturday Night Partly cloudy, with a low around 52.
  • Sunday Sunny, with a high near 71.
  • Sunday Night Mostly clear, with a low around 50.
  • Monday Sunny, with a high near 72.