Lake Herman Weather Forecast

    • 53
    • 71

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 58
    • 90

    Mostly Sunny

    • 58
    • 91

    Mostly Sunny

    • 59
    • 87

    Mostly Sunny

    • 59
    • 86

    Mostly Sunny

    • 60
    • 89

    Mostly Sunny

Today 27 Sep Southwestern Solano County Including Vallejo

Mostly cloudy in the morning then clearing. Highs 66 to 74. Southwest Winds 10 to 15 Mph.

Tonight 27 Sep Southwestern Solano County Including Vallejo

Mostly clear. Lows around 54. Southwest Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Herman Temperature Statistics

September Temperature

Concord, Buchanan Field (8.7 miles)

  • Lowest 23 September, 2026

    53.7 °F

  • Average September

    71.5 °F

  • Highest 9 September, 2026

    101.6 °F

Climate (2021–2026)

Concord, Buchanan Field (8.7 miles)

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  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    61.6 °F

  • Average High 2021–2026

    74.2 °F
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