Mount Gretna Weather Forecast

    • 61
    • 77

    Rain

    • 65
    • 80

    Chance Rain Showers

    • 65
    • 78

    Rain Showers Likely

    • 60
    • 80

    Chance Thunderstorms

    • 58
    • 78

    Mostly Sunny

    • 61
    • 78

    Partly Sunny

    • 66
    • 82

    Chance Rain Showers

Today 20 Aug Lebanon

Rain with a chance of Thunderstorms. Some Thunderstorms may be severe. Highs in the upper 70s. Northeast Winds around 5 Mph. Chance of rain near 100 percent.

Tonight 20 Aug Lebanon

Rain with a chance of Thunderstorms this Evening, then partly cloudy after midnight. Patchy fog. Lows around 60. North Winds 5 to 10 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Gretna Temperature Statistics

August Temperature

Lancaster, Lancaster Airport (12.4 miles)

  • Lowest 4 August, 2026

    62.1 °F

  • Average August

    75.5 °F

  • Highest 6 August, 2026

    89.1 °F

Climate (2021–2026)

Lancaster, Lancaster Airport (12.4 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    55.5 °F

  • Average High 2021–2026

    65.1 °F
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