Newcastle Weather Forecast

    • 50
    • 85

    Increasing Clouds

    • 48
    • 74

    Sunny

    • 54
    • 75

    Mostly Sunny

    • 58
    • 73

    Slight Chance Rain Showers

    • 50
    • 76

    Mostly Sunny

    • 60
    • 73

    Slight Chance Rain Showers

Today 10 Sep Lincoln

Partly sunny. A chance of Showers in the morning. Humid with Highs in the mid 80s. West Winds 10 to 15 Mph. Gusts up to 35 Mph in the afternoon. Chance of rain 50 percent.

Tonight 10 Sep Lincoln

Partly cloudy. Less humid with Lows in the lower 50s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph in the Evening, becoming light and variable.

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Newcastle Temperature Statistics

September Temperature

Wiscasset Airport (9.3 miles)

  • Lowest 1 September, 2026

    51.1 °F

  • Average September

    66.1 °F

  • Highest 4 September, 2026

    82 °F

Climate (2021–2026)

Wiscasset Airport (9.3 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    48.5 °F

  • Average High 2021–2026

    58.1 °F
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