Castine Weather Forecast

    • 18
    • 23

    Increasing Clouds

    • 24
    • 30

    Snow

    • 19
    • 30

    Chance Snow

    • 23
    • 32

    Slight Chance Snow

    • 19
    • 31

    Chance Snow

    • 21
    • 28

    Chance Snow

Today 22 Dec Coastal Hancock

Sunny. Much cooler with Highs in the mid 20s. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 22 Dec Coastal Hancock

Mostly clear in the Evening, then becoming partly cloudy. Cold with Lows 12 to 18. Northwest Winds 5 to 10 Mph. Gusts up to 25 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castine Temperature Statistics

December Temperature

Bar Harbor, Hancock County-Bar Harbor Airport (21.1 miles)

  • Lowest 9 December, 2025

    -0.9 °F

  • Average December

    26.5 °F

  • Highest 19 December, 2025

    54 °F

Climate (2020–Present)

Bar Harbor, Hancock County-Bar Harbor Airport (21.1 miles)

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  • Average Low 2020–2025

    38.4 °F

  • Average 2020–2025

    46.6 °F

  • Average High 2020–2025

    54.8 °F
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