Mountainside Weather Forecast

    • 30
    • 37

    Increasing Clouds

    • 25
    • 43

    Partly Sunny

    • 28
    • 38

    Partly Sunny

    • 33
    • 41

    Chance Rain/Snow

    • 29
    • 43

    Partly Sunny

    • 40
    • 46

    Chance Rain

Today 20 Dec Western Union

Mostly sunny. Much cooler with Highs in the upper 30s. West Winds 5 to 10 Mph, becoming southwest this afternoon.

Tonight 20 Dec Western Union

Partly cloudy in the Evening, then becoming mostly cloudy. Lows around 30. Southwest Winds around 5 Mph.

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Mountainside Temperature Statistics

December Temperature

Linden Airport (6.8 miles)

  • Lowest 9 December, 2025

    16.7 °F

  • Average December

    32 °F

  • Highest 17 December, 2025

    47.3 °F

Climate (2020–Present)

Linden Airport (6.8 miles)

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  • Average Low 2020–2025

    48.1 °F

  • Average 2020–2025

    55.7 °F

  • Average High 2020–2025

    64 °F
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