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Castro Valley/Eden ChamberCastro Valley, CA 7-Day Weather Forecast
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Castro Valley Weather Forecast
Castro Valley, CA Weather Forecast Date: 602 PM PDT Wed Sep 23 2026
Weather forecast for Castro Valley, CA
Tonight Lo: 59°F Lo: 15°C |
Tonight... Mostly clear in the evening then becoming partly cloudy. Lows in the upper 50s. West winds 10 to 15 mph...Becoming southwest up to 5 mph after midnight. |
Thu Hi: 80°FHi: 27°C Lo: 60°F Lo: 16°C |
Thursday... Partly cloudy. Highs in the upper 70s to mid 80s. West winds up to 5 mph increasing to 10 to 20 mph in the afternoon. |
| Fri Hi: 75°FHi: 24°C Lo: 55°F Lo: 13°C |
Friday... Partly cloudy in the morning then becoming sunny. Highs in the 70s. West winds 10 to 20 mph. |
| Sat Hi: 73°FHi: 23°C Lo: 55°F Lo: 13°C |
Saturday... Partly cloudy in the morning then becoming sunny. Highs in the lower to mid 70s. |
| Sun Hi: 66°FHi: 19°C Lo: 55°F Lo: 13°C |
Sunday... Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 60s to lower 70s. |
Mon Hi: 76°FHi: 24°C Lo: 59°F Lo: 15°C |
Monday... Mostly clear. Highs in the 70s to mid 80s. Lows in the upper 50s. |
| Tue Hi: 76°FHi: 24°C Lo: 59°F Lo: 15°C |
Tuesday... Mostly clear. Highs in the 70s to mid 80s. Lows in the upper 50s. |
| Wed Hi: 76°FHi: 24°C Lo: 59°F Lo: 15°C |
Wednesday... Mostly clear. Highs in the 70s to mid 80s. Lows in the upper 50s. |
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