Upper Greenwood Lake Weather Forecast

    • 4
    • 18

    Increasing Clouds

    • 10
    • 22

    Partly Sunny

    • 10
    • 27

    Mostly Sunny

    • 12
    • 28

    Partly Sunny

    • 10
    • 26

    Slight Chance Snow

    • 6
    • 23

    Partly Sunny

Today 31 Jan Western Passaic

Sunny, cold with Highs around 20. North Winds around 5 Mph. Wind chill Values as low as 3 below.

Tonight 31 Jan Western Passaic

Mostly cloudy. Cold with Lows around 6 above. North Winds around 5 Mph, increasing to 10 to 15 Mph with Gusts up to 30 Mph after midnight. Wind chill Values as low as 11 below after midnight.

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Upper Greenwood Lake Temperature Statistics

January Temperature

Sussex, Sussex Airport (12.4 miles)

  • Lowest 21 January, 2026

    -8 °F

  • Average January

    27 °F

  • Highest 8 January, 2026

    48.9 °F

Climate (2021–Present)

Sussex, Sussex Airport (12.4 miles)

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  • Average Low 2021–2026

    42.1 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    63.2 °F
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