Merlo Lake Weather Forecast

    • 53
    • 78

    Decreasing Clouds

    • 52
    • 78

    Partly Sunny

    • 48
    • 70

    Mostly Sunny

    • 50
    • 73

    Sunny

    • 56
    • 82

    Sunny

    • 54
    • 83

    Sunny

    • 56
    • 85

    Sunny

Today 15 May North Bay Interior Valleys

Sunny. Highs in the upper 60s to lower 80s. West Winds 10 to 20 Mph.

Tonight 15 May North Bay Interior Valleys

Partly cloudy. Lows in the upper 40s to mid 50s. West Winds 10 to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Merlo Lake Temperature Statistics

May Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (16.2 miles)

  • Lowest 10 May, 2025

    40.6 °F

  • Average May

    61.9 °F

  • Highest 9 May, 2025

    90.6 °F

Climate (2020–Present)

Santa Rosa, Santa Rosa Sonoma County Airport (16.2 miles)

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  • Average Low 2020–2025

    45.4 °F

  • Average 2020–2025

    57.7 °F

  • Average High 2020–2025

    72.8 °F
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