Suisun Bay - Grizzly Island Wildlife Area Weather Forecast

    • 38
    • 57

    Partly Sunny

    • 45
    • 50

    Mostly Cloudy

    • 47
    • 48

    Rain

    • 50
    • 53

    Rain

    • 50
    • 55

    Rain Likely

    • 49
    • 54

    Rain Likely

Today 29 Dec Carquinez Strait and Delta

Widespread fog and Areas of frost in the morning. Mostly cloudy. Highs 52 to 58. Northeast Winds up to 10 Mph.

Tonight 29 Dec Carquinez Strait and Delta

Mostly clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows around 38. Light Winds.

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Suisun Bay - Grizzly Island Wildlife Area Temperature Statistics

December Temperature

Concord, Buchanan Field (6.2 miles)

  • Lowest 4 December, 2025

    37.9 °F

  • Average December

    49.3 °F

  • Highest 17 December, 2025

    66 °F

Climate (2020–Present)

Concord, Buchanan Field (6.2 miles)

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  • Average Low 2020–2025

    50.9 °F

  • Average 2020–2025

    61.3 °F

  • Average High 2020–2025

    74.3 °F
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