Plum Island Weather Forecast

    • 73
    • 88

    Partly Sunny

    • 67
    • 88

    Chance Rain Showers

    • 67
    • 79

    Mostly Sunny

    • 70
    • 75

    Chance Rain Showers

    • 71
    • 79

    Chance Rain Showers

    • 69
    • 78

    Partly Sunny

Today 9 Sep Eastern Monmouth

Mostly sunny. Humid with Highs in the mid 80s. Southwest Winds 5 to 10 Mph, increasing to south 15 to 20 Mph in the afternoon.

Tonight 9 Sep Eastern Monmouth

Mostly clear in the Evening, then becoming partly cloudy. Humid with Lows in the lower 70s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

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Plum Island Temperature Statistics

September Temperature

Belmar-Farmingdale (17.4 miles)

  • Lowest 6 September, 2026

    62.6 °F

  • Average September

    76.7 °F

  • Highest 1 September, 2026

    90 °F

Climate (2021–2026)

Belmar-Farmingdale (17.4 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    63.3 °F
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