Deer Park Weather Forecast

    • 51
    • 85

    Increasing Clouds

    • 51
    • 78

    Partly Sunny

    • 52
    • 81

    Mostly Sunny

    • 53
    • 84

    Mostly Sunny

    • 54
    • 87

    Mostly Sunny

    • 53
    • 85

    Partly Sunny

Today 15 Sep North Bay Interior Valleys

Sunny. Patchy fog in the morning. Highs in the lower 70s to mid 80s. South Winds 5 to 15 Mph.

Tonight 15 Sep North Bay Interior Valleys

Mostly clear in the evening then becoming partly cloudy. Patchy fog after midnight. Lows in the 40s to upper 50s. South Winds 10 to 15 Mph.

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Deer Park Temperature Statistics

September Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (18.6 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 (18.6 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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