Hopatcong Weather Forecast

    • 54
    • 60

    Rain Showers

    • 57
    • 62

    Rain Showers

    • 56
    • 64

    Chance Rain Showers

    • 55
    • 70

    Partly Sunny

    • 58
    • 74

    Mostly Cloudy

    • 59
    • 75

    Mostly Cloudy

    • 56
    • 74

    Chance Rain Showers

Today 26 Sep Sussex

Partly sunny with a 40 percent chance of Showers. Highs around 70.

Tonight 26 Sep Sussex

Mostly cloudy. A chance of Showers this Evening, then Showers likely after midnight. Lows in the mid 50s. North Winds 10 to 15 Mph with Gusts up to 40 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hopatcong Temperature Statistics

September Temperature

Andover, Aeroflex-Andover Airport (6.2 miles)

  • Lowest 24 September, 2026

    44.1 °F

  • Average September

    65.9 °F

  • Highest 3 September, 2026

    86 °F

Climate (2021–2026)

Andover, Aeroflex-Andover Airport (6.2 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    63.5 °F
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