Martinez Reservoir Weather Forecast

    • 60
    • 91

    Sunny

    • 67
    • 95

    Mostly Sunny

    • 71
    • 100

    Hot

    • 64
    • 96

    Mostly Sunny

    • 60
    • 84

    Mostly Sunny

    • 59
    • 83

    Mostly Sunny

Today 7 Sep East Bay Interior Valleys

Sunny. Highs near 90. Northwest Winds 5 to 10 Mph.

Tonight 7 Sep East Bay Interior Valleys

Mostly clear. Lows in the mid 50s. Light Winds.

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Martinez Reservoir Temperature Statistics

September Temperature

Concord, Buchanan Field (3.1 miles)

  • Lowest 5 September, 2026

    55.9 °F

  • Average September

    67.8 °F

  • Highest 5 September, 2026

    81 °F

Climate (2021–2026)

Concord, Buchanan Field (3.1 miles)

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  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    61.6 °F

  • Average High 2021–2026

    74.3 °F
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