Hopatcong Weather Forecast

    • 56
    • 77

    Mostly Sunny

    • 64
    • 80

    Chance Thunderstorms

    • 66
    • 80

    Chance Rain Showers

    • 67
    • 82

    Chance Thunderstorms

    • 66
    • 83

    Chance Thunderstorms

    • 63
    • 82

    Chance Rain Showers

Today 29 Aug Sussex

Sunny. Highs in the upper 70s. North Winds around 5 Mph, becoming northwest around 5 Mph in the afternoon.

Tonight 29 Aug Sussex

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 50s. Southwest Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hopatcong Temperature Statistics

August Temperature

Andover, Aeroflex-Andover Airport (6.2 miles)

  • Lowest 25 August, 2026

    55 °F

  • Average August

    72.1 °F

  • Highest 7 August, 2026

    90 °F

Climate (2021–2026)

Andover, Aeroflex-Andover Airport (6.2 miles)

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    63.6 °F
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