Mount Gretna Weather Forecast

    • 27
    • 29

    Wintry Mix

    • 25
    • 35

    Mostly Cloudy

    • 36
    • 40

    Rain Showers Likely

    • 26
    • 53

    Rain Showers Likely

    • 24
    • 31

    Breezy

    • 22
    • 35

    Mostly Cloudy

    • 17
    • 30

    Partly Sunny

Today 26 Dec Lebanon

Sleet with a slight chance of freezing rain. Little or no sleet accumulation. Additional ice accumulation around a trace. Much cooler. Near steady temperature in the upper 20s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation 90 percent.

Tonight 26 Dec Lebanon

Sleet with a chance of freezing rain this Evening, then a slight chance of freezing rain after midnight. Precipitation may be heavy at Times this evening. Sleet accumulation around half an inch. Ice accumulation of up to a tenth of an inch. Lows in the upper 20s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming northeast around 5 Mph after midnight. Chance of precipitation near 100 percent.

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Mount Gretna Temperature Statistics

December Temperature

Lancaster, Lancaster Airport (12.4 miles)

  • Lowest 16 December, 2025

    7 °F

  • Average December

    30.2 °F

  • Highest 19 December, 2025

    59 °F

Climate (2020–Present)

Lancaster, Lancaster Airport (12.4 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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