Mount Gretna Weather Forecast

    • 59
    • 61

    Rain Showers

    • 60
    • 75

    Chance Rain Showers

    • 62
    • 78

    Mostly Cloudy

    • 62
    • 81

    Slight Chance Thunderstorms

    • 55
    • 78

    Partly Sunny

    • 53
    • 72

    Partly Sunny

Today 24 May Lebanon

Cloudy. Showers Likely, mainly this morning. Not as cool with Highs in the lower 60s. East Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 24 May Lebanon

Cloudy. A chance of Showers in the Evening, then Showers after midnight. Lows in the upper 50s. East Winds 5 to 10 Mph. Chance of rain 90 percent.

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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

    60.6 °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

    55.6 °F

  • Average High 2021–2026

    65.1 °F
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