Mount Gretna Weather Forecast

    • 70
    • 89

    Severe Tstms

    • 69
    • 81

    Rain Showers Likely

    • 70
    • 86

    Chance Thunderstorms

    • 63
    • 85

    Chance Thunderstorms

    • 60
    • 79

    Mostly Sunny

    • 59
    • 78

    Partly Sunny

    • 60
    • 79

    Slight Chance Thunderstorms

Today 1 Sep Lebanon

Partly sunny with a slight chance of Showers and Thunderstorms. Some Thunderstorms may be severe with damaging Winds and large hail. Warmer. Near steady temperature in the upper 80s. West Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 1 Sep Lebanon

Mostly cloudy. A chance of Showers and Thunderstorms, mainly this evening. Patchy fog after midnight. Some Thunderstorms may be severe with damaging Winds and large Hail, then some Thunderstorms may be severe. Lows in the upper 60s. Northwest Winds 5 to 10 Mph, becoming northeast after midnight. Chance of rain 50 percent.

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Mount Gretna Temperature Statistics

September Temperature

Lancaster, Lancaster Airport (12.4 miles)

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Climate (2021–2026)

Lancaster, Lancaster Airport (12.4 miles)

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    55.5 °F

  • Average High 2021–2026

    65.1 °F
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