Mount Gretna Weather Forecast

    • 46
    • 69

    Increasing Clouds

    • 43
    • 59

    Partly Sunny

    • 39
    • 58

    Partly Sunny

    • 39
    • 57

    Partly Sunny

    • 41
    • 57

    Mostly Cloudy

    • 44
    • 57

    Mostly Cloudy

Today 21 Oct Lebanon

Sunny. A slight chance of Showers in the afternoon. Highs in the upper 60s. South Winds 10 to 15 Mph. Chance of rain 20 percent.

Tonight 21 Oct Lebanon

Clear, cooler with Lows in the lower 40s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Gretna Temperature Statistics

October Temperature

Lancaster, Lancaster Airport (12.4 miles)

  • Lowest 17 October, 2025

    35.1 °F

  • Average October

    57.9 °F

  • Highest 5 October, 2025

    80.1 °F

Climate (2020–Present)

Lancaster, Lancaster Airport (12.4 miles)

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  • Average Low 2020–2025

    46.4 °F

  • Average 2020–2025

    56 °F

  • Average High 2020–2025

    65.6 °F
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