Mount Gretna Weather Forecast
- 10
- 20
Mostly Sunny
- 29
- 33
Mostly Cloudy
- 21
- 42
Partly Sunny
- 8
- 29
Mostly Cloudy
- 10
- 15
Chance Snow Showers
- 9
- 18
Chance Snow Showers
Today 20 Jan Lebanon
Sunny, Colder with Highs around 20. West Winds 10 to 15 Mph with Gusts up to 25 Mph. Wind chill Values as low as 7 below this morning.
Tonight 20 Jan Lebanon
Mostly clear. Lows around 10. West Winds 5 to 10 Mph, becoming southwest after midnight. Wind chill Values as low as 3 above.
Mount Gretna Temperature Statistics
January Temperature
Lancaster, Lancaster Airport (12.4 miles)
Lowest 1 January, 2026
18 °FAverage January
33.4 °FHighest 7 January, 2026
55 °F
Climate (2021–Present)
Lancaster, Lancaster Airport (12.4 miles)
Average Low 2021–2026
46.1 °FAverage 2021–2026
55.7 °FAverage High 2021–2026
65.3 °F