Lisbon Weather Forecast

    • 57
    • 73

    Partly Sunny

    • 55
    • 78

    Slight Chance Thunderstorms

    • 54
    • 78

    Partly Sunny

    • 54
    • 78

    Mostly Sunny

    • 55
    • 77

    Partly Sunny

    • 57
    • 75

    Partly Sunny

    • 54
    • 80

    Partly Sunny

Today 13 Sep Northern New London

Mostly sunny. Highs in the lower 70s. South Winds 5 to 10 Mph.

Tonight 13 Sep Northern New London

Partly cloudy in the Evening, then becoming mostly cloudy. Patchy fog after midnight. Lows in the upper 50s. Southwest Winds around 5 Mph.

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Lisbon Temperature Statistics

September Temperature

Willimantic, Windham Airport (13 miles)

  • Lowest 9 September, 2025

    45 °F

  • Average September

    63.1 °F

  • Highest 5 September, 2025

    81 °F

Climate (2020–Present)

Willimantic, Windham Airport (13 miles)

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  • Average Low 2020–2025

    41.7 °F

  • Average 2020–2025

    51.8 °F

  • Average High 2020–2025

    61.9 °F
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