Mount Gretna Weather Forecast

    • 47
    • 67

    Becoming Sunny

    • 52
    • 73

    Mostly Sunny

    • 52
    • 75

    Mostly Sunny

    • 52
    • 73

    Slight Chance Thunderstorms

    • 53
    • 74

    Mostly Sunny

    • 59
    • 80

    Mostly Sunny

    • 64
    • 86

    Partly Sunny

Today 30 May Lebanon

Sunny, cooler. Near steady temperature in the mid 60s. North Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 30 May Lebanon

Clear. Lows in the mid 40s. North Winds 10 to 15 Mph with Gusts up to 25 Mph, Diminishing to around 5 Mph after midnight.

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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

    61.1 °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

    55.6 °F

  • Average High 2021–2026

    65.1 °F
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