Belfast Weather Forecast

    • 55
    • 78

    Rain Showers

    • 50
    • 63

    Rain Showers

    • 46
    • 71

    Mostly Sunny

    • 47
    • 70

    Partly Sunny

    • 50
    • 69

    Partly Sunny

    • 45
    • 74

    Mostly Sunny

Today 6 Sep Coastal Waldo

Partly sunny with a chance of Showers and Thunderstorms. Some Thunderstorms may be severe with damaging Winds and large hail. Highs in the upper 70s. South Winds around 10 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

Tonight 6 Sep Coastal Waldo

Cloudy. Showers with a chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Patchy fog after midnight. Some Thunderstorms may be severe with damaging Winds and large hail. Lows in the mid 50s. West Winds around 10 Mph with Gusts up to 25 Mph in the Evening, becoming light and variable. Chance of rain 90 percent.

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Belfast Temperature Statistics

September Temperature

Rockland, Knox County Regional Airport (24.9 miles)

  • Lowest 3 September, 2025

    50 °F

  • Average September

    61.7 °F

  • Highest 1 September, 2025

    75.9 °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

    48 °F

  • Average High 2020–2025

    55.3 °F
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