Weather in Mount Gretna, PA
Mount Gretna, Tuesday, 3 November, 23:39
Clear. Feels like 50°. High 70°, low 44°.
Monthly outlook for Mount Gretna, PA: average high 56.6°, average low 39.7°. That is 1.9° above the climate normal for November. Precipitation is expected on 1 day (about 0.7 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 4 November (73.4°), the coolest 15 November (29.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 3 November – 12 November | 61.1° | 54.8° | +3.5° |
| 13 November – 22 November | 49.2° | 50° | -0.5° |
| 23 November – 2 December | at normal | 47.5° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Lebanon (7 mi).
0
Mount Gretna, Wednesday, 4 November
Mostly clear. High 73°, low 50°.
0.65
Mount Gretna, Thursday, 5 November
Heavy rain. High 72°, low 54°.
0
Mount Gretna, Friday, 6 November
Partly cloudy. High 68°, low 52°.
0
Mount Gretna, Saturday, 7 November
Clear. High 55°, low 45°.
0
Mount Gretna, Sunday, 8 November
Overcast. High 54°, low 42°.
0Mount Gretna, Monday, 9 November
Partly cloudy. High 54°, low 39°.
0Mount Gretna, Tuesday, 10 November
Clear. High 61°, low 39°.
0Mount Gretna, Wednesday, 11 November
Clear. High 57°, low 40°.
0Mount Gretna, Thursday, 12 November
Overcast. High 47°, low 36°.
0Mount Gretna, Friday, 13 November
Overcast. High 52°, low 38°.
0.02Mount Gretna, Saturday, 14 November
Light rain. High 49°, low 32°.
0Mount Gretna, Sunday, 15 November
Mostly clear. High 40°, low 30°.
0Mount Gretna, Monday, 16 November
Clear. High 47°, low 31°.
0Mount Gretna, Tuesday, 17 November
Clear. High 52°, low 30°.
0Mount Gretna, Wednesday, 18 November
Partly cloudy. High 56°, low 34°.
0.1Mount Gretna, Thursday, 19 November
Climate normal for this date — 60-year average.
0.1Mount Gretna, Friday, 20 November
Climate normal for this date — 60-year average.
0.11Mount Gretna, Saturday, 21 November
Climate normal for this date — 60-year average.
0.12
Mount Gretna, Sunday, 22 November
Climate normal for this date — 60-year average.
0.07Mount Gretna, Monday, 23 November
Climate normal for this date — 60-year average.
0.13Mount Gretna, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.12Mount Gretna, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.17Mount Gretna, Thursday, 26 November
Climate normal for this date — 60-year average.
0.1Mount Gretna, Friday, 27 November
Climate normal for this date — 60-year average.
0.22Mount Gretna, Saturday, 28 November
Climate normal for this date — 60-year average.
0.13Mount Gretna, Sunday, 29 November
Climate normal for this date — 60-year average.
0.12Mount Gretna, Monday, 30 November
Climate normal for this date — 60-year average.
0.14Mount Gretna, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.1Mount Gretna, Wednesday, 2 December
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Mount Gretna, PA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Mount Gretna, PA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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