Mount Gretna Weather Forecast

    • 68
    • 87

    Chance Rain Showers

    • 63
    • 84

    Mostly Sunny

    • 67
    • 85

    Partly Sunny

    • 63
    • 81

    Chance Thunderstorms

    • 65
    • 80

    Chance Rain Showers

    • 66
    • 79

    Chance Rain Showers

    • 63
    • 80

    Slight Chance Thunderstorms

Today 17 Aug Lebanon

Partly sunny with a chance of Showers and Thunderstorms. Warmer with Highs in the upper 80s. Northwest Winds around 5 Mph. Chance of rain 50 percent.

Tonight 17 Aug Lebanon

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Humid with Lows in the upper 60s. Northwest Winds around 5 Mph. Chance of rain 50 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

    75.8 °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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