Hopatcong Weather Forecast

    • 24
    • 38

    Rain/Snow

    • 20
    • 30

    Partly Sunny

    • 20
    • 32

    Chance Snow

    • 21
    • 34

    Chance Snow

    • 14
    • 28

    Slight Chance Snow

    • 15
    • 25

    Mostly Cloudy

Today 10 Dec Sussex

A chance of snow with a slight chance of freezing rain this Morning, then snow and rain this afternoon. Snow accumulation up to 1 inch. Highs in the upper 30s. South Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of precipitation near 100 percent.

Tonight 10 Dec Sussex

Mostly cloudy. A chance of rain with a slight chance of snow in the evening. Little or no snow accumulation. Cold with Lows in the lower 20s. Southwest Winds 5 to 10 Mph, becoming west 10 to 15 Mph after midnight. Gusts up to 30 Mph. Chance of precipitation 40 percent.

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Hopatcong Temperature Statistics

December Temperature

Andover, Aeroflex-Andover Airport (6.2 miles)

  • Lowest 5 December, 2025

    10.9 °F

  • Average December

    28.3 °F

  • Highest 1 December, 2025

    41 °F

Climate (2020–Present)

Andover, Aeroflex-Andover Airport (6.2 miles)

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  • Average Low 2020–2025

    44 °F

  • Average 2020–2025

    53.7 °F

  • Average High 2020–2025

    63.8 °F
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