Mount Gretna Weather Forecast

    • 30
    • 33

    Increasing Clouds

    • 23
    • 41

    Partly Sunny

    • 7
    • 32

    Mostly Cloudy

    • 10
    • 15

    Snow Likely

    • 11
    • 16

    Snow Likely

    • 5
    • 23

    Partly Sunny

Today 21 Jan Lebanon

Mostly sunny this Morning, then mostly cloudy with a slight chance of snow Showers this afternoon. Not as cool with Highs in the lower 30s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of snow 20 percent. Wind chill Values as low as 2 below this morning.

Tonight 21 Jan Lebanon

Mostly cloudy and not as cool. Near steady temperature in the lower 30s. Southwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Gretna Temperature Statistics

January Temperature

Lancaster, Lancaster Airport (12.4 miles)

  • Lowest 18 January, 2026

    14 °F

  • Average January

    33 °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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