Calistoga Weather Forecast

    • 47
    • 72

    Mostly Sunny

    • 48
    • 75

    Mostly Sunny

    • 49
    • 74

    Mostly Sunny

    • 54
    • 82

    Mostly Sunny

    • 55
    • 83

    Partly Sunny

    • 57
    • 81

    Partly Sunny

Today 4 Sep North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the mid 60s to upper 70s. West Winds 5 to 10 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 4 Sep North Bay Interior Valleys

Mostly clear except patchy fog after midnight. Lows in the 40s to mid 50s. West Winds 10 to 20 Mph. Becoming 5 to 10 Mph after midnight.

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Calistoga Temperature Statistics

September Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (13.7 miles)

  • Lowest 1 September, 2026

    52.6 °F

  • Average September

    63.6 °F

  • Highest 1 September, 2026

    73.7 °F

Climate (2021–2026)

Santa Rosa, Santa Rosa Sonoma County Airport (13.7 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    72.9 °F
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