Glenbrook Weather Forecast

    • 45
    • 52

    Rain

    • 49
    • 52

    Rain

    • 46
    • 52

    Rain

    • 45
    • 47

    Rain

    • 45
    • 47

    Rain Likely

    • 44
    • 48

    Rain Likely

Today 31 Dec Southern Lake County

Cloudy. Slight chance of drizzle in the morning. Chance of rain through the day. Highs 51 to 61.

Tonight 31 Dec Southern Lake County

Rain. Lows 40 to 50.

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Glenbrook Temperature Statistics

December Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (24.2 miles)

  • Lowest 4 December, 2025

    34 °F

  • Average December

    48 °F

  • Highest 3 December, 2025

    68 °F

Climate (2020–Present)

Santa Rosa, Santa Rosa Sonoma County Airport (24.2 miles)

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  • Average Low 2020–2025

    45.6 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    72.5 °F
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