Mount Gretna Weather Forecast

    • 34
    • 41

    Rain

    • 28
    • 40

    Partly Sunny

    • 29
    • 40

    Partly Sunny

    • 35
    • 45

    Mostly Cloudy

    • 28
    • 45

    Mostly Cloudy

    • 20
    • 34

    Slight Chance Rain/Snow

Today 10 Jan Lebanon

Patchy fog in the morning. A chance of rain in the Morning, then rain in the afternoon. Highs in the lower 40s. East Winds 5 to 10 Mph. Chance of rain near 100 percent.

Tonight 10 Jan Lebanon

Mostly cloudy. Patchy fog. Lows in the upper 30s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Gretna Temperature Statistics

January Temperature

Lancaster, Lancaster Airport (12.4 miles)

  • Lowest 1 January, 2026

    18 °F

  • Average January

    30.3 °F

  • Highest 7 January, 2026

    55 °F

Climate (2021–Present)

Lancaster, Lancaster Airport (12.4 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    55.7 °F

  • Average High 2021–2026

    65.3 °F
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