Alder Lake Weather Forecast

    • 15
    • 27

    Mostly Cloudy

    • 21
    • 35

    Slight Chance Snow Showers

    • 25
    • 35

    Mostly Cloudy

    • 29
    • 42

    Mostly Cloudy

    • 27
    • 37

    Rain/Snow Likely

    • 17
    • 35

    Chance Snow

Today 14 Feb Western Ulster

Mostly cloudy. Near steady temperature in the mid 30s. West Winds around 5 Mph.

Tonight 14 Feb Western Ulster

Partly cloudy. Cold with Lows around 17. Northwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alder Lake Temperature Statistics

February Temperature

Monticello, Sullivan County International Airport (24.9 miles)

  • Lowest 8 February, 2026

    -7.1 °F

  • Average February

    16 °F

  • Highest 10 February, 2026

    32 °F

Climate (2021–Present)

Monticello, Sullivan County International Airport (24.9 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    45.6 °F

  • Average High 2021–2026

    55 °F
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