Merlo Lake Weather Forecast

    • 68
    • 99

    Hot

    • 65
    • 98

    Hot

    • 62
    • 98

    Hot

    • 63
    • 95

    Mostly Sunny

    • 59
    • 95

    Mostly Sunny

    • 52
    • 84

    Mostly Sunny

Today 5 Oct North Bay Interior Valleys

Sunny. Highs mid 80s to 100. Southwest Winds 5 to 10 Mph.

Tonight 5 Oct North Bay Interior Valleys

Mostly clear. Lows in the upper 50s to lower 70s. West Winds 5 to 10 Mph.

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Merlo Lake Temperature Statistics

October Temperature

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

  • Lowest 1 October, 2026

    45.6 °F

  • Average October

    69.5 °F

  • Highest 3 October, 2026

    100 °F

Climate (2021–2026)

Santa Rosa, Santa Rosa Sonoma County Airport (16.2 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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