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About Mount Diablo State ParkMount Diablo State Park, CA 7-Day Weather Forecast
Summit Rd, Walnut Creek, CA 94598 (925) 837-2525Quick Weather Clicks
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Mount Diablo State Park Weather Forecast
Mount Diablo State Park, CA Weather Forecast Date: 902 PM PDT Mon Aug 31 2026
Weather forecast for Mount Diablo State Park, CA
Tonight Lo: 55°F Lo: 13°C |
Tonight... Mostly cloudy. Lows in the mid 50s. Southwest winds around 20 mph with gusts to around 35 mph. |
Tue Hi: 71°FHi: 22°C Lo: 55°F Lo: 13°C |
Tuesday... Mostly cloudy in the morning then becoming partly cloudy. Highs in the lower 70s. Southwest winds 15 to 20 mph. |
Wed Hi: 75°FHi: 24°C Lo: 59°F Lo: 15°C |
Wednesday... Mostly cloudy in the morning then becoming sunny. Highs in the mid 70s. Southwest winds 5 to 10 mph. |
| Thu Hi: 75°FHi: 24°C Lo: 59°F Lo: 15°C |
Thursday... Partly cloudy. Highs in the mid 70s. |
| Fri Hi: 79°FHi: 26°C Lo: 55°F Lo: 13°C |
Friday... Partly cloudy. Highs in the upper 70s. |
Sat Hi: 79°FHi: 26°C Lo: 55°F Lo: 13°C |
Saturday... Mostly clear. Lows in the mid 50s. Highs in the upper 70s. |
| Sat Hi: 79°FHi: 26°C Lo: 55°F Lo: 13°C |
Saturday... Mostly clear. Lows in the mid 50s. Highs in the upper 70s. |
| Sun Hi: 85°FHi: 29°C Lo: 60°F Lo: 16°C |
Sunday... Mostly clear. Highs in the mid 80s. Lows around 60. |
| Mon Hi: 85°FHi: 29°C Lo: 60°F Lo: 16°C |
Monday... Mostly clear. Highs in the mid 80s. Lows around 60. |
| Tue Hi: 85°FHi: 29°C Lo: 60°F Lo: 16°C |
Tuesday... Mostly clear. Highs in the mid 80s. Lows around 60. |
| Wed Hi: 85°FHi: 29°C Lo: 60°F Lo: 16°C |
Wednesday... Mostly clear. Highs in the mid 80s. Lows around 60. |
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