Mount Diablo State Park Weather Forecast

    • 70
    • 85

    Sunny

    • 68
    • 83

    Sunny

    • 70
    • 86

    Sunny

    • 72
    • 88

    Mostly Sunny

    • 71
    • 86

    Mostly Sunny

    • 67
    • 80

    Mostly Sunny

Today 5 Aug East Bay Hills

Sunny. Highs in the mid 90s. Southwest Winds around 10 Mph.

Tonight 5 Aug East Bay Hills

Clear. Lows in the lower 60s. Southwest Winds 10 to 15 Mph.

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Mount Diablo State Park Temperature Statistics

August Temperature

Concord, Buchanan Field (10.6 miles)

  • Lowest 1 August, 2026

    60.7 °F

  • Average August

    79.4 °F

  • Highest 2 August, 2026

    100 °F

Climate (2021–2026)

Concord, Buchanan Field (10.6 miles)

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  • Average Low 2021–2026

    51 °F

  • Average 2021–2026

    61.5 °F

  • Average High 2021–2026

    74.3 °F
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