Cornwall Weather Forecast

    • 60
    • 78

    Chance Rain Showers

    • 60
    • 71

    Chance Rain Showers

    • 59
    • 82

    Mostly Sunny

    • 57
    • 85

    Mostly Sunny

    • 56
    • 77

    Partly Sunny

    • 58
    • 76

    Partly Sunny

Today 16 Sep Lebanon

Mostly sunny. A slight chance of Showers in the afternoon. Highs in the upper 70s. Northeast Winds 10 to 15 Mph. Chance of rain 20 percent.

Tonight 16 Sep Lebanon

Mostly cloudy with a chance of Showers. Lows in the upper 50s. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cornwall Temperature Statistics

September Temperature

Lancaster, Lancaster Airport (11.8 miles)

  • Lowest 8 September, 2025

    48 °F

  • Average September

    66.8 °F

  • Highest 4 September, 2025

    82 °F

Climate (2020–Present)

Lancaster, Lancaster Airport (11.8 miles)

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  • Average Low 2020–2025

    46.3 °F

  • Average 2020–2025

    55.9 °F

  • Average High 2020–2025

    65.6 °F
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