Belfast Weather Forecast

    • 21
    • 31

    Chance Snow

    • 12
    • 30

    Chance Snow

    • 12
    • 23

    Partly Sunny

    • 18
    • 29

    Partly Sunny

    • 20
    • 39

    Mostly Cloudy

    • 33
    • 43

    Rain Likely

    • 15
    • 46

    Slight Chance Snow

Today 13 Dec Coastal Waldo

Mostly cloudy with a 50 percent chance of snow Showers. Highs in the lower 30s. Light and variable Winds.

Tonight 13 Dec Coastal Waldo

Cloudy. A chance of snow after midnight. Lows in the lower 20s. Light and variable Winds. Chance of snow 40 percent.

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Belfast Temperature Statistics

December Temperature

Rockland, Knox County Regional Airport (24.9 miles)

  • Lowest 9 December, 2025

    -2 °F

  • Average December

    25.6 °F

  • Highest 10 December, 2025

    45 °F

Climate (2020–Present)

Rockland, Knox County Regional Airport (24.9 miles)

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  • Average Low 2020–2025

    39.9 °F

  • Average 2020–2025

    47.9 °F

  • Average High 2020–2025

    55.2 °F
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