Merlo Lake Weather Forecast

    • 54
    • 76

    Sunny

    • 55
    • 84

    Sunny

    • 59
    • 89

    Sunny

    • 59
    • 90

    Mostly Sunny

    • 56
    • 89

    Mostly Sunny

    • 54
    • 83

    Mostly Sunny

    • 53
    • 80

    Mostly Sunny

Today 17 May North Bay Interior Valleys

Sunny. Highs in the 70s to lower 80s. North Winds 10 to 20 Mph with Gusts to around 35 Mph.

Tonight 17 May North Bay Interior Valleys

Clear, breezy. Lows in the lower 50s to mid 60s. North Winds 10 to 20 Mph increasing to 20 to 30 Mph after midnight.

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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 13 May, 2026

    44.7 °F

  • Average May

    61.9 °F

  • Highest 15 May, 2026

    82.4 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    72.7 °F
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