Allagash Lake Weather Forecast

    • 42
    • 71

    Patchy Fog

    • 45
    • 76

    Mostly Sunny

    • 50
    • 79

    Partly Sunny

    • 46
    • 80

    Slight Chance Rain Showers

    • 34
    • 63

    Mostly Sunny

    • 34
    • 60

    Mostly Sunny

    • 43
    • 67

    Partly Sunny

Today 15 Sep Northern Piscataquis

Sunny. Highs in the lower 70s. Northwest Winds around 5 Mph.

Tonight 15 Sep Northern Piscataquis

Mostly clear. Patchy fog after midnight. Lows in the lower 40s. Northwest Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Real-Time

Allagash Lake Temperature Statistics

September Temperature

Clayton Lake (19.9 miles)

  • Lowest 9 September, 2025

    35.6 °F

  • Average September

    55.6 °F

  • Highest 1 September, 2025

    78.6 °F

Climate (2020–Present)

Clayton Lake (19.9 miles)

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  • Average Low 2020–2025

    30.3 °F

  • Average 2020–2025

    40.8 °F

  • Average High 2020–2025

    50.1 °F
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