Russian River Mouth Weather Forecast

    • 55
    • 59

    Rain Likely

    • 54
    • 59

    Rain Likely

    • 54
    • 57

    Chance Rain Showers

    • 54
    • 59

    Partly Sunny

    • 54
    • 60

    Partly Sunny

    • 55
    • 59

    Slight Chance Rain Showers

Today 8 Sep Coastal North Bay Including Point Reyes National Seashore

Patchy fog in the morning. A chance of rain in the Morning, then Showers likely in the afternoon. Highs in the upper 60s. Southwest Winds 5 to 10 Mph.

Tonight 8 Sep Coastal North Bay Including Point Reyes National Seashore

Mostly cloudy. Areas of fog. A slight chance of rain. Lows in the mid 50s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Russian River Mouth Temperature Statistics

September Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (16.8 miles)

  • Lowest 1 September, 2025

    51.1 °F

  • Average September

    66.5 °F

  • Highest 1 September, 2025

    99 °F

Climate (2020–Present)

Santa Rosa, Santa Rosa Sonoma County Airport (16.8 miles)

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  • Average Low 2020–2025

    45.3 °F

  • Average 2020–2025

    57.9 °F

  • Average High 2020–2025

    72.9 °F
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