Bothe-Napa Valley State Park Weather Forecast

    • 54
    • 86

    Sunny

    • 52
    • 85

    Mostly Sunny

    • 52
    • 79

    Mostly Sunny

    • 53
    • 79

    Mostly Sunny

    • 54
    • 84

    Mostly Sunny

    • 55
    • 85

    Mostly Sunny

Today 14 Sep North Bay Interior Valleys

Sunny. Highs in the mid 70s to lower 90s. Southwest Winds 5 to 15 Mph.

Tonight 14 Sep North Bay Interior Valleys

Mostly clear except patchy fog after midnight. Lows in the 50s. West Winds 10 to 15 Mph. Becoming southwest up to 5 Mph after midnight.

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Bothe-Napa Valley State Park Temperature Statistics

September Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (15.5 miles)

  • Lowest 5 September, 2026

    46.7 °F

  • Average September

    68.3 °F

  • Highest 10 September, 2026

    101.6 °F

Climate (2021–2026)

Santa Rosa, Santa Rosa Sonoma County Airport (15.5 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    72.8 °F
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