Loch Lomond Weather Forecast

    • 47
    • 67

    Mostly Sunny

    • 53
    • 69

    Mostly Sunny

    • 49
    • 73

    Mostly Sunny

    • 49
    • 71

    Partly Sunny

    • 51
    • 67

    Mostly Sunny

    • 54
    • 72

    Mostly Sunny

Today 22 May Southern Lake County

Sunny. Highs 67 to 81.

Tonight 22 May Southern Lake County

Mostly clear. Lows 42 to 52.

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  • Temperature Forecast NOAA

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Loch Lomond Temperature Statistics

May Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (25.5 miles)

  • Lowest 10 May, 2025

    40.6 °F

  • Average May

    62.8 °F

  • Highest 9 May, 2025

    90.6 °F

Climate (2020–Present)

Santa Rosa, Santa Rosa Sonoma County Airport (25.5 miles)

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  • Average Low 2020–2025

    45.4 °F

  • Average 2020–2025

    57.8 °F

  • Average High 2020–2025

    72.9 °F
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