Mount Gretna Weather Forecast

    • 48
    • 51

    Rain Showers

    • 56
    • 66

    Rain Showers

    • 60
    • 76

    Chance Rain Showers

    • 61
    • 78

    Mostly Cloudy

    • 62
    • 80

    Mostly Cloudy

    • 57
    • 78

    Slight Chance Rain Showers

Today 23 May Lebanon

Rain. Much cooler with Highs in the lower 50s. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

Tonight 23 May Lebanon

Rain in the Evening, then Showers with a slight chance of Thunderstorms after midnight. Near steady temperature in the upper 40s. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain near 100 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

    60.7 °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

    65.2 °F
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