Mount Gretna Weather Forecast

    • 60
    • 74

    Clearing Late

    • 60
    • 81

    Mostly Sunny

    • 65
    • 82

    Chance Rain Showers

    • 64
    • 80

    Rain Showers

    • 57
    • 80

    Chance Rain Showers

    • 54
    • 75

    Mostly Sunny

Today 21 Aug Lebanon

Cloudy. A chance of Showers, mainly in the morning. Highs in the mid 70s. Northeast Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 30 percent.

Tonight 21 Aug Lebanon

Mostly cloudy in the Evening, then clearing. Lows in the upper 50s. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Gretna Temperature Statistics

August Temperature

Lancaster, Lancaster Airport (12.4 miles)

  • Lowest 3 August, 2025

    56.6 °F

  • Average August

    73.7 °F

  • Highest 13 August, 2025

    91.7 °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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