Bethel Island Weather Forecast

    • 58
    • 88

    Sunny

    • 57
    • 85

    Mostly Sunny

    • 57
    • 83

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 54
    • 80

    Sunny

    • 55
    • 84

    Sunny

    • 55
    • 85

    Sunny

Today 16 Jun East Bay Interior Valleys

Sunny. Highs in the mid 80s to lower 90s. West Winds 10 to 15 Mph.

Tonight 16 Jun East Bay Interior Valleys

Mostly clear. Lows in the upper 50s. West Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bethel Island Temperature Statistics

June Temperature

Concord, Buchanan Field (22.4 miles)

  • Lowest 7 June, 2026

    53.7 °F

  • Average June

    72.9 °F

  • Highest 11 June, 2026

    101.6 °F

Climate (2021–Present)

Concord, Buchanan Field (22.4 miles)

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  • Average Low 2021–2026

    51 °F

  • Average 2021–2026

    61.5 °F

  • Average High 2021–2026

    74.4 °F
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