Spencer Mill Lake Weather Forecast

    • 59
    • 77

    Mostly Cloudy

    • 49
    • 78

    Partly Sunny

    • 29
    • 63

    Chance Rain Showers

    • 25
    • 49

    Mostly Sunny

    • 31
    • 54

    Mostly Sunny

    • 36
    • 61

    Mostly Cloudy

Today 27 Dec Northern St. Tammany

Mostly cloudy in the Morning, then becoming mostly sunny. Areas of dense fog in the morning. Highs in the upper 70s. Southwest Winds 5 to 10 Mph.

Tonight 27 Dec Northern St. Tammany

Partly cloudy. Patchy fog after midnight. Lows around 60. South Winds around 5 Mph.

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Spencer Mill Lake Temperature Statistics

December Temperature

Slidell, Slidell Airport (8.1 miles)

  • Lowest 15 December, 2025

    25 °F

  • Average December

    53.7 °F

  • Highest 21 December, 2025

    79 °F

Climate (2020–Present)

Slidell, Slidell Airport (8.1 miles)

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  • Average Low 2020–2025

    59.8 °F

  • Average 2020–2025

    69.9 °F

  • Average High 2020–2025

    80.5 °F
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