Cold Spring Harbor Weather Forecast

    • 58
    • 70

    Slight Chance Rain

    • 55
    • 66

    Chance Rain

    • 55
    • 65

    Breezy

    • 53
    • 64

    Chance Rain Showers

    • 55
    • 65

    Chance Rain Showers

    • 56
    • 65

    Chance Rain Showers

Today 21 Sep Northern Nassau

Partly sunny. Highs in the lower 70s. Northeast Winds 15 to 20 Mph.

Tonight 21 Sep Northern Nassau

Mostly cloudy. A slight chance of rain after midnight. Lows in the upper 50s. Northeast Winds 15 to 20 Mph. Chance of rain 20 percent.

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  • Temperature Real-Time

Cold Spring Harbor Temperature Statistics

September Temperature

Farmingdale - Republic Airport (10.6 miles)

  • Lowest 15 September, 2026

    55 °F

  • Average September

    71.4 °F

  • Highest 3 September, 2026

    87.1 °F

Climate (2021–2026)

Farmingdale - Republic Airport (10.6 miles)

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  • Average Low 2021–2026

    48.1 °F

  • Average 2021–2026

    55.7 °F

  • Average High 2021–2026

    63 °F
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