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Castro Valley, California

Current conditions and the National Weather Service 7-day forecast for Castro Valley, California — temperature, rain chance, wind, radar and active alerts.

Saturday Oct 3: a high near 94°F and a low around 69°F. Highs over the period run 79°F to 94°F.

National Weather Service forecast for Castro Valley, California
DayHighLowPrecip
Saturday Oct 394°69°—
Sunday Oct 493°67°—
Monday Oct 591°67°—
Tuesday Oct 691°67°—
Wednesday Oct 791°65°—
Thursday Oct 888°63°—
Friday Oct 979°——

NOAA NWS NDFD 2.5 km, run 2026-10-03 15:00 UTC · days are local time in America/Los Angeles. The live page updates continuously.

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