Weather in Mount Gretna, PA
Mount Gretna, Monday, 2 November, 15:45
Overcast. Feels like 64°. High 65°, low 40°.
Monthly outlook for Mount Gretna, PA: average high 57.2°, average low 40.6°. That is 1.9° above the climate normal for November. Precipitation is expected on 2 days (about 1.8 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 4 November (70.4°), the coolest 17 November (27°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 2 November – 11 November | 62.1° | 55.6° | +3.6° |
| 12 November – 21 November | 48.9° | 50.4° | -0.8° |
| 22 November – 1 December | at normal | 47.8° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Lebanon (7 mi).
0Mount Gretna, Tuesday, 3 November
Overcast. High 69°, low 39°.
0
Mount Gretna, Wednesday, 4 November
Clear. High 70°, low 44°.
0.46
Mount Gretna, Thursday, 5 November
Rain. High 70°, low 57°.
0.02Mount Gretna, Friday, 6 November
Light rain. High 69°, low 55°.
0.02Mount Gretna, Saturday, 7 November
Light rain. High 66°, low 51°.
0Mount Gretna, Sunday, 8 November
Overcast. High 59°, low 44°.
1.25Mount Gretna, Monday, 9 November
Rain. High 52°, low 44°.
0
Mount Gretna, Tuesday, 10 November
Partly cloudy. High 49°, low 40°.
0Mount Gretna, Wednesday, 11 November
Overcast. High 52°, low 39°.
0Mount Gretna, Thursday, 12 November
Partly cloudy. High 53°, low 38°.
0Mount Gretna, Friday, 13 November
Overcast. High 49°, low 35°.
0Mount Gretna, Saturday, 14 November
Overcast. High 55°, low 32°.
0Mount Gretna, Sunday, 15 November
Overcast. High 47°, low 32°.
0Mount Gretna, Monday, 16 November
Overcast. High 45°, low 31°.
0Mount Gretna, Tuesday, 17 November
Overcast. High 44°, low 27°.
0.09Mount Gretna, Wednesday, 18 November
Climate normal for this date — 60-year average.
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.
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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