Mount Katahdin Weather Forecast

    • 45
    • 58

    Rain Showers

    • 41
    • 48

    Chance Rain Showers

    • 40
    • 51

    Partly Sunny

    • 44
    • 53

    Chance Rain Showers

    • 38
    • 49

    Partly Sunny

    • 43
    • 50

    Rain Showers Likely

Today 4 Sep Northern Piscataquis

Numerous Showers with isolated Thunderstorms. Near steady temperature in the upper 60s. North Winds around 5 Mph. Chance of rain 70 percent.

Tonight 4 Sep Northern Piscataquis

Mostly cloudy. Numerous Showers with isolated Thunderstorms in the Evening, then scattered Showers after midnight. Patchy fog. Lows around 50. North Winds 5 to 10 Mph. Chance of rain 70 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 1 September, 2026

    45.6 °F

  • Average September

    61.4 °F

  • Highest 1 September, 2026

    76.6 °F

Climate (2021–2026)

Millinocket, Millinocket Municipal Airport (20.5 miles)

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  • Average Low 2021–2026

    35.9 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    55 °F
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