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Castro Valley, CA Weather & Current Conditions

94546 Weather (Castro Valley, CA)

Current Conditions and Weather for Castro Valley, California

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Clear at Castro Valley (94546), temperature is 54°F12°C, dew point 49°F9°C, humidity 82%. Wind direction is NE at 9 mphat 14 km/h with visibility of 10 mi16 km. Barometric pressure is 29.84 in1010 mb. Last update: 5:20 am.*

*Time is approximately 5:20 am Tue, Sep 29, 2026. Time will be within 15 minutes of current local time. Castro Valley weather forecast data is updated every 15 minutes.

Sun & Moon

Converter

Cloud Cover	0%
uv UV Index	6
Sunrise	07:02 AM
Sunset	06:54 PM
Moonrise	08:28 PM
Moonset	10:31 AM

Civil Twilight
6:33 AM to 7:00 AM
6:54 PM to 7:20 PM
Waning Gibbous Moon

Weather Quote O' the Day

Do you know, I believe we should all behave quite differently if we lived in a warm, sunny climate all the time. We shouldn't be so withdrawn and shy and difficult. ―Laura Jesson ―The Movie: Brief Encounter

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Castro Valley Weather Forecast

Weather forecast for: Castro Valley CA

Last Update: 1:36 am PDT Sep 29, 2026

Today: Sunny, with a high near 85. Calm wind becoming west 5 to 8 mph in the afternoon.

Tonight: Mostly clear, with a low around 58. Light south wind.

Wednesday: Sunny, with a high near 88. Calm wind becoming west 5 to 7 mph in the afternoon.

Wednesday Night: Mostly clear, with a low around 57. West wind around 6 mph becoming calm in the evening.

Thursday: Sunny, with a high near 87. Calm wind becoming west around 6 mph in the afternoon.

Thursday Night: Partly cloudy, with a low around 59.

Friday: Mostly sunny, with a high near 88.

Friday Night: Partly cloudy, with a low around 61.

Saturday: Mostly sunny, with a high near 88.

Saturday Night: Partly cloudy, with a low around 62.

Sunday: Sunny, with a high near 87.

Sunday Night: Mostly clear, with a low around 61.

Monday: Sunny, with a high near 87.

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