Grindstone Weather Forecast

    • 15
    • 26

    Increasing Clouds

    • 16
    • 34

    Mostly Cloudy

    • 32
    • 40

    Rain

    • 14
    • 49

    Rain

    • 13
    • 22

    Snow Likely

    • 9
    • 29

    Slight Chance Snow

Today 16 Dec Northern Penobscot

Mostly sunny this Morning, then becoming partly sunny. Highs in the mid 20s. West Winds 5 to 10 Mph.

Tonight 16 Dec Northern Penobscot

Mostly cloudy. Cold with Lows around 14. Temperature rising to around 20 after midnight. South Winds 5 to 10 Mph with Gusts up to 25 Mph.

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Grindstone Temperature Statistics

December Temperature

Millinocket, Millinocket Municipal Airport (7.5 miles)

  • Lowest 9 December, 2025

    3 °F

  • Average December

    17.4 °F

  • Highest 1 December, 2025

    36 °F

Climate (2020–Present)

Millinocket, Millinocket Municipal Airport (7.5 miles)

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  • Average Low 2020–2025

    36.3 °F

  • Average 2020–2025

    45.7 °F

  • Average High 2020–2025

    55.1 °F
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