Hopatcong Weather Forecast

    • 57
    • 70

    Rain Showers

    • 55
    • 69

    Mostly Cloudy

    • 56
    • 80

    Mostly Sunny

    • 61
    • 81

    Partly Sunny

    • 63
    • 79

    Rain Showers Likely

    • 55
    • 78

    Chance Thunderstorms

Today 20 Aug Sussex

Cloudy. A chance of Showers this Morning, then Showers with a chance of Thunderstorms this afternoon. Highs around 70. East Winds 5 to 10 Mph. Chance of rain 80 percent.

Tonight 20 Aug Sussex

Cloudy. Showers likely with a chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Lows in the mid 50s. Northeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hopatcong Temperature Statistics

August Temperature

Andover, Aeroflex-Andover Airport (6.2 miles)

  • Lowest 3 August, 2025

    53.7 °F

  • Average August

    72.8 °F

  • Highest 12 August, 2025

    94.6 °F

Climate (2020–Present)

Andover, Aeroflex-Andover Airport (6.2 miles)

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  • Average Low 2020–2025

    44.1 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    63.8 °F
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