Mount Gretna Weather Forecast

    • 28
    • 40

    Snow Showers

    • 18
    • 32

    Mostly Cloudy

    • 9
    • 33

    Partly Sunny

    • 10
    • 19

    Mostly Sunny

    • 26
    • 32

    Mostly Cloudy

    • 21
    • 37

    Chance Snow Showers

Today 17 Jan Lebanon

Cloudy with snow this Morning, then partly sunny with a slight chance of snow this afternoon. Snow may be heavy at Times this morning. Snow accumulation of 1 to 3 Inches. Not as cool with Highs in the lower 40s. South Winds 5 to 10 Mph, becoming southwest this afternoon. Chance of snow 90 percent.

Tonight 17 Jan Lebanon

Mostly cloudy. Lows in the mid 20s. West Winds around 5 Mph.

Graph Plots Open in Graphs

  • 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

    34.6 °F

  • Highest 7 January, 2026

    55 °F

Climate (2021–Present)

Lancaster, Lancaster Airport (12.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    55.8 °F

  • Average High 2021–2026

    65.3 °F
Get WillyWeather+ to remove ads