Mount Gretna Weather Forecast

    • 8
    • 18

    Mostly Cloudy

    • 13
    • 23

    Partly Sunny

    • 11
    • 29

    Mostly Sunny

    • 15
    • 31

    Mostly Cloudy

    • 11
    • 28

    Chance Snow Showers

    • 11
    • 27

    Slight Chance Snow Showers

Today 31 Jan Lebanon

Mostly sunny. Highs around 20. Northwest Winds 5 to 10 Mph. Wind chill Values as low as 15 below this morning.

Tonight 31 Jan Lebanon

Mostly cloudy in the Evening, then becoming partly cloudy. Not as cold with Lows around 10. North Winds 10 to 15 Mph with Gusts up to 30 Mph. Wind chill Values as low as 9 below after midnight.

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  • Temperature Real-Time

Mount Gretna Temperature Statistics

January Temperature

Lancaster, Lancaster Airport (12.4 miles)

  • Lowest 21 January, 2026

    -4 °F

  • Average January

    27.5 °F

  • Highest 7 January, 2026

    55 °F

Climate (2021–Present)

Lancaster, Lancaster Airport (12.4 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    55.6 °F

  • Average High 2021–2026

    65.3 °F
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