Mount Gretna Weather Forecast

    • 56
    • 65

    Rain Likely

    • 58
    • 62

    Rain

    • 57
    • 67

    Mostly Cloudy

    • 56
    • 72

    Partly Sunny

    • 58
    • 75

    Partly Sunny

    • 61
    • 75

    Mostly Cloudy

Today 26 Sep Lebanon

Mostly cloudy with a 50 percent chance of rain. Highs in the mid 60s. North Winds 15 to 20 Mph with Gusts up to 35 Mph.

Tonight 26 Sep Lebanon

Cloudy with a 50 percent chance of rain. Lows in the mid 50s. North Winds 15 to 20 Mph with Gusts up to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Gretna Temperature Statistics

September Temperature

Lancaster, Lancaster Airport (12.4 miles)

  • Lowest 15 September, 2026

    48 °F

  • Average September

    69.9 °F

  • Highest 1 September, 2026

    89.1 °F

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 °F
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