Walnut Creek Weather Forecast

    • 43
    • 56

    Partly Sunny

    • 44
    • 63

    Partly Sunny

    • 46
    • 62

    Partly Sunny

    • 47
    • 65

    Partly Sunny

    • 45
    • 65

    Partly Sunny

    • 44
    • 63

    Partly Sunny

Today 7 Dec East Bay Interior Valleys

Mostly cloudy. Widespread dense fog in the morning. Highs in the 50s to lower 60s. Light Winds.

Tonight 7 Dec East Bay Interior Valleys

Partly cloudy. Patchy fog after midnight. Lows in the lower 40s. North Winds up to 5 Mph in the evening. Becoming light.

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Walnut Creek Temperature Statistics

December Temperature

Concord, Buchanan Field (5.6 miles)

  • Lowest 4 December, 2025

    37.9 °F

  • Average December

    47.2 °F

  • Highest 3 December, 2025

    64.9 °F

Climate (2020–Present)

Concord, Buchanan Field (5.6 miles)

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  • Average Low 2020–2025

    50.8 °F

  • Average 2020–2025

    61.3 °F

  • Average High 2020–2025

    74.3 °F
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