Hopatcong Weather Forecast

    • 30
    • 49

    Mostly Sunny

    • 36
    • 56

    Mostly Sunny

    • 41
    • 61

    Partly Sunny

    • 41
    • 64

    Mostly Sunny

    • 39
    • 59

    Partly Sunny

    • 43
    • 61

    Partly Sunny

    • 42
    • 60

    Partly Sunny

Today 17 Oct Sussex

Mostly sunny. Highs in the upper 50s.

Tonight 17 Oct Sussex

Mostly clear. Widespread frost after midnight. Colder with Lows in the upper 20s. North Winds 10 to 15 Mph.

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  • Temperature Real-Time

Hopatcong Temperature Statistics

October Temperature

Andover, Aeroflex-Andover Airport (6.2 miles)

  • Lowest 7 October, 2026

    36 °F

  • Average October

    57.9 °F

  • Highest 2 October, 2026

    82 °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

    53.4 °F

  • Average High 2021–2026

    63.5 °F
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