Mount Gretna Weather Forecast

    • 60
    • 80

    Gradual Clearing

    • 52
    • 74

    Mostly Sunny

    • 55
    • 75

    Mostly Sunny

    • 49
    • 72

    Mostly Sunny

    • 54
    • 71

    Partly Sunny

    • 54
    • 73

    Partly Sunny

    • 53
    • 73

    Partly Sunny

Today 27 May Lebanon

Mostly cloudy. Near steady temperature around 80. West Winds around 10 Mph.

Tonight 27 May Lebanon

Mostly cloudy. Lows in the upper 50s. Northwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Gretna Temperature Statistics

May Temperature

Lancaster, Lancaster Airport (12.4 miles)

  • Lowest 4 May, 2026

    36 °F

  • Average May

    60.1 °F

  • Highest 18 May, 2026

    93.9 °F

Climate (2021–Present)

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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