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About Mount Diablo State ParkMount Diablo State Park, CA 7-Day Night Weather Forecast
Summit Rd, Walnut Creek, CA 94598 (925) 837-2525Quick Weather Clicks
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Mount Diablo State Park, CA Weather Forecast
Mount Diablo State Park, CA Weather Forecast Date: 602 AM PDT Tue Sep 15 2026
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Today... Sunny. Highs in the lower 80s. Southwest winds 5 to 10 mph.
Tonight... Mostly clear. Lows in the mid 50s. Southwest winds 10 to 20 mph.
Wednesday... Sunny. Highs in the mid 70s. Southwest winds around 20 mph.
Wednesday Night... Mostly clear in the evening then becoming partly cloudy. Lows in the mid 50s. Southwest winds 10 to 20 mph.
Thursday... Partly cloudy in the morning then becoming sunny. Highs around 80. West winds 5 to 10 mph.
Thursday Night... Mostly clear. Lows in the mid 50s.
Friday... Mostly clear. Highs in the lower 80s. Lows in the mid 50s.
Saturday... Mostly clear. Highs in the lower 80s. Lows in the mid 50s.
Saturday Night... Partly cloudy. Lows in the mid 50s. Highs in the upper 70s.
Sunday... Partly cloudy. Lows in the mid 50s. Highs in the upper 70s.
POP = Probability of Precipitation
Mount Diablo State Park Radar Loop
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