Inclement Weather in the West

A couple of systems will impact the West Coast bringing precipitation to the Pacific Northwest, California, and into the Great Basin through the weekend. Periods of moderate to heavy rain, thunderstorms, gusty winds, and periods of heavy mountain are expected in northern California. Travel impacts are expected due to heavy snow over the Sierras. Read More >

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Current conditions at

LOS ALTOS (LOAC1)

Lat: 37.354722°NLon: 122.141667°WElev: 539ft.

45°F

7°C

Humidity	77%
Wind Speed	W 3 MPH
Barometer	1005.08 mb
Dewpoint	38°F (3°C)
Visibility	NA
Last update	04 Apr 02:10 AM PDT

More Information:

Local Forecast Office More Local Wx 3 Day History Mobile Weather Hourly Weather Forecast

Extended Forecast for

Sunnyvale CA

Overnight

Mostly Clear
Low: 44 °F
Saturday

Rain Likely
High: 62 °F
Saturday
Night

Rain Likely
Low: 50 °F
Sunday

Showers and
Breezy
High: 59 °F
Sunday
Night

Showers
Likely
Low: 44 °F
Monday

Showers
Likely
High: 58 °F
Monday
Night

Chance
Showers
Low: 42 °F
Tuesday

Chance Rain
High: 62 °F
Tuesday
Night

Partly Cloudy
Low: 45 °F

Detailed Forecast

Overnight

Mostly clear, with a low around 44. Calm wind.

Saturday

Rain likely, mainly after 11am. Mostly cloudy, with a high near 62. Calm wind becoming south southwest 5 to 8 mph in the morning. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

Saturday Night

Rain likely, mainly after 11pm. Increasing clouds, with a low around 50. Light and variable wind becoming south southeast 5 to 8 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Sunday

Rain before 11am, then showers and possibly a thunderstorm after 11am. Some of the storms could produce small hail. High near 59. Breezy, with a south southeast wind 9 to 14 mph becoming south southwest 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

Showers likely and possibly a thunderstorm before 11pm, then a chance of rain after 11pm. Some of the storms could produce small hail. Mostly cloudy, with a low around 44. Southwest wind 10 to 15 mph becoming light and variable. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday

Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am. Some of the storms could produce small hail. Mostly cloudy, with a high near 58. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday Night

A chance of showers and thunderstorms before 11pm, then a slight chance of rain after 11pm. Some of the storms could produce small hail. Mostly cloudy, with a low around 42. Chance of precipitation is 30%.

Tuesday

A chance of rain, mainly after 11am. Partly sunny, with a high near 62.

Tuesday Night

Partly cloudy, with a low around 45.

Wednesday

A slight chance of rain. Mostly sunny, with a high near 64.

Wednesday Night

Partly cloudy, with a low around 47.

Thursday

A slight chance of rain. Mostly sunny, with a high near 64.

Thursday Night

Partly cloudy, with a low around 48.