Cornwall Weather Forecast

    • 24
    • 32

    Partly Sunny

    • 23
    • 34

    Mostly Cloudy

    • 23
    • 39

    Chance Snow

    • 17
    • 28

    Partly Sunny

    • 19
    • 29

    Mostly Cloudy

    • 21
    • 33

    Partly Sunny

Today 11 Dec Lebanon

Mostly sunny. Highs in the lower 30s. West Winds 15 to 20 Mph with Gusts up to 40 Mph.

Tonight 11 Dec Lebanon

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 20s. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cornwall Temperature Statistics

December Temperature

Lancaster, Lancaster Airport (11.8 miles)

  • Lowest 9 December, 2025

    10.9 °F

  • Average December

    29.7 °F

  • Highest 1 December, 2025

    41 °F

Climate (2020–Present)

Lancaster, Lancaster Airport (11.8 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    55.8 °F

  • Average High 2020–2025

    65.4 °F
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