Fetters Hot Springs-Agua Caliente Weather Forecast

    • 58
    • 95

    Sunny

    • 57
    • 97

    Hot

    • 56
    • 87

    Mostly Cloudy

    • 55
    • 82

    Partly Sunny

    • 54
    • 86

    Mostly Sunny

    • 57
    • 92

    Mostly Sunny

Today 16 Sep North Bay Interior Valleys

Sunny. Highs in the lower 80s to mid 90s. South Winds 5 to 10 Mph.

Tonight 16 Sep North Bay Interior Valleys

Mostly clear. Lows in the lower 50s to mid 60s. West Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fetters Hot Springs-Agua Caliente Temperature Statistics

September Temperature

Petaluma Municipal Airport (7.5 miles)

  • Lowest 14 September, 2025

    48.2 °F

  • Average September

    62.6 °F

  • Highest 1 September, 2025

    93.2 °F

Climate (2020–Present)

Petaluma Municipal Airport (7.5 miles)

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  • Average Low 2020–2025

    44.4 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    69.1 °F
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