Hopatcong Weather Forecast

    • 45
    • 64

    Chance Rain

    • 44
    • 53

    Rain

    • 52
    • 60

    Rain Showers Likely

    • 56
    • 74

    Chance Rain Showers

    • 59
    • 79

    Mostly Cloudy

    • 58
    • 82

    Partly Sunny

Today 22 May Sussex

Partly sunny this Morning, then becoming mostly cloudy. Highs in the mid 60s. East Winds 5 to 10 Mph.

Tonight 22 May Sussex

Cloudy. A chance of rain after midnight. Lows in the mid 40s. East Winds around 5 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hopatcong Temperature Statistics

May Temperature

Andover, Aeroflex-Andover Airport (6.2 miles)

  • Lowest 1 May, 2026

    36 °F

  • Average May

    59.5 °F

  • Highest 19 May, 2026

    93 °F

Climate (2021–Present)

Andover, Aeroflex-Andover Airport (6.2 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    63.7 °F
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