Hopatcong Weather Forecast

    • 64
    • 75

    Chance Rain Showers

    • 56
    • 77

    Chance Rain Showers

    • 55
    • 74

    Mostly Sunny

    • 57
    • 77

    Mostly Sunny

    • 61
    • 80

    Chance Rain Showers

    • 63
    • 79

    Rain Showers Likely

Today 22 Aug Sussex

Patchy fog this morning. Cloudy this Morning, then partly sunny with a slight chance of Showers this afternoon. Highs in the mid 70s. East Winds around 5 Mph. Chance of rain 20 percent.

Tonight 22 Aug Sussex

Mostly cloudy with a chance of Showers. Patchy fog. A slight chance of Thunderstorms after midnight. Lows in the lower 60s. Southeast Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hopatcong Temperature Statistics

August Temperature

Andover, Aeroflex-Andover Airport (6.2 miles)

  • Lowest 4 August, 2026

    57 °F

  • Average August

    73.8 °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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