Alder Lake Weather Forecast

    • -5
    • 11

    Mostly Cloudy

    • 1
    • 13

    Mostly Cloudy

    • 4
    • 21

    Partly Sunny

    • 7
    • 23

    Mostly Cloudy

    • 3
    • 20

    Mostly Cloudy

    • 3
    • 20

    Mostly Cloudy

Today 31 Jan Western Ulster

Sunny, cold with Highs around 18. North Winds around 5 Mph.

Tonight 31 Jan Western Ulster

Partly cloudy. Cold with Lows around 2 below. North Winds around 5 Mph.

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Alder Lake Temperature Statistics

January Temperature

Monticello, Sullivan County International Airport (24.9 miles)

  • Lowest 21 January, 2026

    -9 °F

  • Average January

    21.4 °F

  • Highest 9 January, 2026

    44.1 °F

Climate (2021–Present)

Monticello, Sullivan County International Airport (24.9 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    45.7 °F

  • Average High 2021–2026

    55 °F
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