Mount Gretna Weather Forecast

    • 64
    • 88

    Chance Thunderstorms

    • 60
    • 81

    Mostly Sunny

    • 60
    • 80

    Mostly Sunny

    • 62
    • 82

    Rain Showers

    • 61
    • 79

    Rain Showers Likely

    • 60
    • 80

    Mostly Sunny

Today 18 Jun Lebanon

Mostly cloudy in the Morning, then becoming partly sunny. A slight chance of Thunderstorms. A chance of Showers, mainly in the morning. Very warm. Humid with Highs in the upper 80s. South Winds 10 to 15 Mph with Gusts up to 30 Mph, becoming west 15 to 20 Mph with Gusts up to 40 Mph in the afternoon. Chance of rain 50 percent.

Tonight 18 Jun Lebanon

Partly cloudy. Lows in the lower 60s. West Winds 15 to 20 Mph with Gusts up to 35 Mph, Diminishing to 5 to 10 Mph with Gusts up to 20 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Gretna Temperature Statistics

June Temperature

Lancaster, Lancaster Airport (12.4 miles)

  • Lowest 2 June, 2026

    46.9 °F

  • Average June

    71.9 °F

  • Highest 12 June, 2026

    95 °F

Climate (2021–2026)

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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