Weather in Castle Shannon, PA
Castle Shannon, Saturday, 7 November, 08:28
Overcast. Feels like 37°. High 47°, low 42°.
Monthly outlook for Castle Shannon, PA: average high 51.5°, average low 40.2°. That is 1.1° above the climate normal for November. Precipitation is expected on 3 days (about 2.1 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 22 November (61°), the coolest 15 November (31°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 7 November – 16 November | 48.3° | 50.7° | -1.3° |
| 17 November – 26 November | 57° | 47.4° | +5.3° |
| 27 November – 6 December | at normal | 43.6° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Mount Lebanon (2 mi).
0
Castle Shannon, Sunday, 8 November
Clear. High 55°, low 39°.
0Castle Shannon, Monday, 9 November
Overcast. High 50°, low 40°.
0Castle Shannon, Tuesday, 10 November
Clear. High 58°, low 39°.
0Castle Shannon, Wednesday, 11 November
Overcast. High 55°, low 39°.
0.52
Castle Shannon, Thursday, 12 November
Rain. High 46°, low 40°.
1.39
Castle Shannon, Friday, 13 November
Snow. High 38°, low 35°.
0.18Castle Shannon, Saturday, 14 November
Snow. High 37°, low 34°.
0
Castle Shannon, Sunday, 15 November
Partly cloudy. High 45°, low 31°.
0Castle Shannon, Monday, 16 November
Overcast. High 51°, low 36°.
0Castle Shannon, Tuesday, 17 November
Overcast. High 54°, low 38°.
0Castle Shannon, Wednesday, 18 November
Overcast. High 52°, low 45°.
0Castle Shannon, Thursday, 19 November
Overcast. High 56°, low 42°.
0
Castle Shannon, Friday, 20 November
Mostly clear. High 60°, low 43°.
0.01Castle Shannon, Saturday, 21 November
Light rain. High 60°, low 48°.
0Castle Shannon, Sunday, 22 November
Overcast. High 61°, low 52°.
0.07Castle Shannon, Monday, 23 November
Climate normal for this date — 60-year average.
0.11
Castle Shannon, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.12Castle Shannon, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.18Castle Shannon, Thursday, 26 November
Climate normal for this date — 60-year average.
0.14Castle Shannon, Friday, 27 November
Climate normal for this date — 60-year average.
0.18Castle Shannon, Saturday, 28 November
Climate normal for this date — 60-year average.
0.1Castle Shannon, Sunday, 29 November
Climate normal for this date — 60-year average.
0.13Castle Shannon, Monday, 30 November
Climate normal for this date — 60-year average.
0.15Castle Shannon, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.11Castle Shannon, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.13Castle Shannon, Thursday, 3 December
Climate normal for this date — 60-year average.
0.11Castle Shannon, Friday, 4 December
Climate normal for this date — 60-year average.
0.13Castle Shannon, Saturday, 5 December
Climate normal for this date — 60-year average.
0.15Castle Shannon, Sunday, 6 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 Castle Shannon, 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 Castle Shannon, 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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