Hopatcong Weather Forecast

    • 35
    • 41

    Rain

    • 25
    • 41

    Slight Chance Rain

    • 26
    • 37

    Mostly Sunny

    • 31
    • 41

    Mostly Cloudy

    • 26
    • 42

    Slight Chance Rain/Snow

    • 18
    • 34

    Chance Rain/Snow

Today 10 Jan Sussex

Mostly cloudy. Rain in the afternoon. Highs in the lower 40s. North Winds around 5 Mph, becoming east around 5 Mph in the afternoon. Chance of rain 90 percent.

Tonight 10 Jan Sussex

Rain. Near steady temperature in the upper 30s. Northeast Winds 5 to 10 Mph, becoming west after midnight. Chance of rain 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hopatcong Temperature Statistics

January Temperature

Andover, Aeroflex-Andover Airport (6.2 miles)

  • Lowest 3 January, 2026

    8.1 °F

  • Average January

    27.5 °F

  • Highest 7 January, 2026

    46.9 °F

Climate (2021–Present)

Andover, Aeroflex-Andover Airport (6.2 miles)

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    63.7 °F
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