Hopatcong Weather Forecast

    • 53
    • 70

    Chance Rain Showers

    • 52
    • 66

    Rain Showers

    • 47
    • 64

    Chance Rain Showers

    • 46
    • 59

    Chance Rain Showers

    • 46
    • 60

    Chance Rain Showers

    • 46
    • 59

    Chance Rain Showers

Today 19 Sep Sussex

Mostly sunny. Not as warm with Highs in the upper 60s. East Winds around 5 Mph.

Tonight 19 Sep Sussex

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers after midnight. Lows in the lower 50s. Light and variable Winds, becoming southeast around 5 Mph after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hopatcong Temperature Statistics

September Temperature

Andover, Aeroflex-Andover Airport (6.2 miles)

  • Lowest 15 September, 2026

    46.9 °F

  • Average September

    68.1 °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

    43.7 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    63.6 °F
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