Plum Island Weather Forecast

    • 40
    • 52

    Chance Rain

    • 38
    • 46

    Rain

    • 29
    • 45

    Slight Chance Rain

    • 32
    • 41

    Partly Sunny

    • 36
    • 44

    Mostly Cloudy

    • 31
    • 46

    Slight Chance Rain

    • 23
    • 40

    Chance Snow

Today 9 Jan Eastern Monmouth

Mostly cloudy with a 50 percent chance of rain. Near steady temperature in the upper 40s. South Winds 10 to 15 Mph.

Tonight 9 Jan Eastern Monmouth

Cloudy. A chance of rain this evening. Lows in the lower 40s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming northwest after midnight. Chance of rain 50 percent.

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  • Temperature Real-Time

Plum Island Temperature Statistics

January Temperature

Belmar-Farmingdale (17.4 miles)

  • Lowest 1 January, 2026

    24.8 °F

  • Average January

    33.4 °F

  • Highest 7 January, 2026

    51.8 °F

Climate (2021–Present)

Belmar-Farmingdale (17.4 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    55.7 °F

  • Average High 2021–2026

    63.6 °F
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