Mount Gretna Weather Forecast

    • 59
    • 76

    Slight Chance Rain Showers

    • 62
    • 79

    Mostly Cloudy

    • 61
    • 81

    Mostly Cloudy

    • 53
    • 77

    Mostly Sunny

    • 53
    • 75

    Partly Sunny

    • 52
    • 73

    Partly Sunny

Today 25 May Lebanon

Mostly cloudy. Patchy fog this morning. Showers Likely, mainly this morning. Much warmer with Highs in the upper 70s. Southwest Winds around 5 Mph, becoming northwest around 5 Mph this afternoon. Chance of rain 70 percent.

Tonight 25 May Lebanon

Mostly cloudy. Patchy fog after midnight. Lows in the upper 50s. Northeast Winds around 5 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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