San Joaquin River - West Island Weather Forecast

    • 49
    • 63

    Increasing Clouds

    • 54
    • 57

    Chance Rain

    • 56
    • 59

    Rain

    • 57
    • 59

    Rain

    • 55
    • 60

    Rain

    • 53
    • 56

    Rain Likely

Today 17 Dec Carquinez Strait and Delta

Patchy fog until late afternoon. Mostly cloudy with a chance of rain Showers in the Morning, then partly cloudy in the afternoon. Not as cool. Highs 59 to 64. South Winds 10 to 15 Mph with Gusts to around 25 Mph.

Tonight 17 Dec Carquinez Strait and Delta

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog in the Evening, then Areas of fog after midnight. Lows around 43. West Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Joaquin River - West Island Temperature Statistics

December Temperature

Concord, Buchanan Field (14.9 miles)

  • Lowest 4 December, 2025

    37.9 °F

  • Average December

    44.2 °F

  • Highest 3 December, 2025

    64.9 °F

Climate (2020–Present)

Concord, Buchanan Field (14.9 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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