Hopatcong Weather Forecast

    • 69
    • 85

    Chance Thunderstorms

    • 65
    • 86

    Mostly Sunny

    • 68
    • 86

    Partly Sunny

    • 65
    • 83

    Chance Thunderstorms

    • 64
    • 82

    Chance Rain Showers

    • 61
    • 81

    Chance Rain Showers

Today 8 Aug Sussex

Partly sunny. Patchy fog in the morning. A chance of Showers and Thunderstorms in the afternoon. Hot with Highs in the mid 80s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 8 Aug Sussex

Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Humid with Lows in the upper 60s. Southwest Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 50 percent.

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Hopatcong Temperature Statistics

August Temperature

Andover, Aeroflex-Andover Airport (6.2 miles)

  • Lowest 4 August, 2026

    57 °F

  • Average August

    74.1 °F

  • Highest 1 August, 2026

    86 °F

Climate (2021–2026)

Andover, Aeroflex-Andover Airport (6.2 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    63.6 °F
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