Mount Gretna Weather Forecast

    • 63
    • 91

    Rain Showers Likely

    • 64
    • 85

    Mostly Sunny

    • 60
    • 87

    Rain Showers Likely

    • 59
    • 76

    Partly Sunny

    • 59
    • 77

    Slight Chance Thunderstorms

    • 63
    • 81

    Chance Thunderstorms

Today 12 Jun Lebanon

Mostly sunny. Showers likely with a chance of Thunderstorms in the afternoon. Some Thunderstorms may be severe. Hot with Highs in the lower 90s. West Winds 5 to 10 Mph. Chance of rain 70 percent. Heat index Values up to 105.

Tonight 12 Jun Lebanon

Mostly cloudy with Showers likely with a chance of Thunderstorms in the Evening, then mostly clear after midnight. Some Thunderstorms may be severe. Humid with Lows in the lower 60s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

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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

    69.3 °F

  • Highest 5 June, 2026

    89.1 °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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