Black Diamond Mines Regional Preserve Weather Forecast

    • 60
    • 81

    Mostly Sunny

    • 61
    • 87

    Mostly Sunny

    • 60
    • 83

    Partly Sunny

    • 63
    • 87

    Partly Sunny

    • 64
    • 88

    Partly Sunny

    • 63
    • 86

    Partly Sunny

Today 15 Aug East Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Highs in the upper 70s to mid 80s. West Winds 5 to 15 Mph.

Tonight 15 Aug East Bay Interior Valleys

Partly cloudy. Lows in the upper 50s. West Winds 5 to 10 Mph.

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Black Diamond Mines Regional Preserve Temperature Statistics

August Temperature

Concord, Buchanan Field (9.9 miles)

  • Lowest 12 August, 2026

    57.9 °F

  • Average August

    76.6 °F

  • Highest 2 August, 2026

    100.7 °F

Climate (2021–2026)

Concord, Buchanan Field (9.9 miles)

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  • Average Low 2021–2026

    51 °F

  • Average 2021–2026

    61.6 °F

  • Average High 2021–2026

    74.3 °F
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