Contra Loma Reservoir Regional Park Weather Forecast

    • 50
    • 60

    Mostly Cloudy

    • 55
    • 59

    Rain

    • 54
    • 56

    Rain

    • 56
    • 59

    Rain

    • 53
    • 57

    Rain

    • 50
    • 55

    Rain

    • 50
    • 54

    Rain

Today 18 Dec East Bay Interior Valleys

Mostly cloudy. Highs around 60. Southwest Winds around 5 Mph.

Tonight 18 Dec East Bay Interior Valleys

Mostly cloudy. Patchy fog. A slight chance of rain after midnight. Lows in the upper 40s. Light Winds. Becoming south around 5 Mph after midnight.

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Contra Loma Reservoir Regional Park Temperature Statistics

December Temperature

Concord, Buchanan Field (12.4 miles)

  • Lowest 4 December, 2025

    37.9 °F

  • Average December

    44.4 °F

  • Highest 3 December, 2025

    64.9 °F

Climate (2020–Present)

Concord, Buchanan Field (12.4 miles)

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  • Average Low 2020–2025

    50.8 °F

  • Average 2020–2025

    61.2 °F

  • Average High 2020–2025

    74.2 °F
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