Mount Katahdin Weather Forecast

    • 42
    • 59

    Chance Rain Showers

    • 31
    • 45

    Slight Chance Rain Showers

    • 33
    • 42

    Breezy

    • 41
    • 50

    Mostly Sunny

    • 48
    • 55

    Partly Sunny

    • 52
    • 57

    Chance Rain Showers

Today 18 Sep Northern Piscataquis

Patchy fog this morning. Mostly sunny. Highs in the upper 70s. Southwest Winds 5 to 10 Mph.

Tonight 18 Sep Northern Piscataquis

Partly cloudy in the Evening, then becoming mostly cloudy. Isolated Showers. Lows in the mid 40s. West Winds 5 to 10 Mph, becoming northwest with Gusts up to 20 Mph after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Katahdin Temperature Statistics

September Temperature

Millinocket, Millinocket Municipal Airport (20.5 miles)

  • Lowest 9 September, 2025

    39.9 °F

  • Average September

    59.3 °F

  • Highest 1 September, 2025

    79 °F

Climate (2020–Present)

Millinocket, Millinocket Municipal Airport (20.5 miles)

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  • Average Low 2020–2025

    36.2 °F

  • Average 2020–2025

    45.7 °F

  • Average High 2020–2025

    55.1 °F
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