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Mount Diablo State Park, CA Weather Forecast

Summit Rd, Walnut Creek, CA 94598 (925) 837-2525
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Mount Diablo State Park, CA Weather Forecast

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Mount Diablo State Park CA weather - Clear - 82°F
Clear
82°F
Updated 5:49 pm
Feels Like 77°F
Humidity 26%
Wind WSW 12 mph
Barometer  29.84 in
Dew Point 44°F
Mount Diablo State Park CA weather - Clear - 28°C
Clear
28°C
Updated 5:49 pm
Feels Like 25°C
Humidity 26%
Wind WSW 19 km/h
Barometer  101 kPa
Dew Point 7°C
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Mount Diablo State Park Weather Forecast

REST OF TODAY TONIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT
Mount Diablo State Park, CA Weather - Rest Of Today Sunny Mount Diablo State Park, CA Weather - Tonight Mostly Clear Mount Diablo State Park, CA Weather - Monday Partly Cloudy Mount Diablo State Park, CA Weather - Monday Night Partly Cloudy Mount Diablo State Park, CA Weather - Tuesday Partly Cloudy Mount Diablo State Park, CA Weather - Tuesday Night Partly Cloudy Mount Diablo State Park, CA Weather - Wednesday Mostly Clear Mount Diablo State Park, CA Weather - Wednesday Night Mostly Clear Mount Diablo State Park, CA Weather - Thursday Partly Cloudy Mount Diablo State Park, CA Weather - Thursday Night Mostly Clear Mount Diablo State Park, CA Weather - Friday Partly Cloudy Mount Diablo State Park, CA Weather - Friday Night Mostly Clear
Sunny Mostly Clear Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Mostly Clear Mostly Clear Partly Cloudy Mostly Clear Partly Cloudy Mostly Clear
Hi: 81°FHi: 27°C
 Lo: 55°FLo: 13°C Hi: 75°FHi: 24°C
 Lo: 55°FLo: 13°C Hi: 75°FHi: 24°C
 Lo: 55°FLo: 13°C Hi: 79°FHi: 26°C
Lo: 59°FLo: 15°C		 Hi: 79°FHi: 26°C
Lo: 59°FLo: 15°C		 Hi: 79°FHi: 26°C
 Lo: 59°FLo: 15°C Hi: 79°FHi: 26°C
 Hi: 80°FHi: 27°C
Lo: 55°FLo: 13°C
POP = Probability of Precipitation.
Weather Outlook Updated: 302 PM PDT Sun Aug 30 2026 Mount Diablo State Park, CA Weather - WeatherWorld.com

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Issued: 537 PM PDT Sun Aug 30 2026

Key Messages

Updated at 1232 PM PDT Sun Aug 30 2026
  • Slight chance for coastal drizzle during the night and morning hours through Tuesday morning
  • Cooling trend continues through at least midweek

Aviation

... (00Z TAFS) Issued at 537 PM PDT Sun Aug 30 2026

VFR prevails except for areas of stratus and fog/mist /MVFR-IFR/ along the immediate coast south of Point Reyes. A steady erosion of stratus on the northwestern edge continues to press southward likely due to drawn down mixing of drier air aloft ove...