Fetters Hot Springs-Agua Caliente Weather Forecast

    • 53
    • 90

    Mostly Sunny

    • 51
    • 84

    Becoming Sunny

    • 51
    • 85

    Sunny

    • 51
    • 90

    Mostly Sunny

    • 50
    • 87

    Mostly Sunny

    • 50
    • 85

    Mostly Sunny

    • 50
    • 85

    Mostly Sunny

Today 11 Sep North Bay Interior Valleys

Sunny. Highs in the mid 70s to upper 80s. Southwest Winds 10 to 20 Mph.

Tonight 11 Sep North Bay Interior Valleys

Mostly clear. Lows in the 50s. Southwest Winds 10 to 20 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 7 September, 2026

    44.6 °F

  • Average September

    66.7 °F

  • Highest 9 September, 2026

    96.8 °F

Climate (2021–2026)

Petaluma Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    68.5 °F
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