Weather in Upper St. Clair, PA
Upper St. Clair, Thursday, 8 October, 18:31
Clear. Feels like 66°. High 71°, low 51°.
Monthly outlook for Upper St. Clair, PA: average high 65.2°, average low 48°. That is 1.9° above the climate normal for October. Precipitation is expected on 6 days (about 1.4 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 16 October (79.8°), the coolest 19 October (33.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 October – 17 October | 69.9° | 63.3° | +3.6° |
| 18 October – 27 October | 57.5° | 58.7° | -0.7° |
| 28 October – 6 November | at normal | 56° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Mount Lebanon (3 mi).
0Upper St. Clair, Friday, 9 October
Clear. High 71°, low 44°.
0
Upper St. Clair, Saturday, 10 October
Overcast. High 72°, low 46°.
0.74
Upper St. Clair, Sunday, 11 October
Heavy rain. High 66°, low 56°.
0.04Upper St. Clair, Monday, 12 October
Light rain. High 70°, low 60°.
0.13Upper St. Clair, Tuesday, 13 October
Light rain. High 72°, low 56°.
0
Upper St. Clair, Wednesday, 14 October
Mostly clear. High 65°, low 49°.
0.21Upper St. Clair, Thursday, 15 October
Light rain. High 76°, low 56°.
0.22Upper St. Clair, Friday, 16 October
Light rain. High 80°, low 62°.
0Upper St. Clair, Saturday, 17 October
Overcast. High 55°, low 42°.
0Upper St. Clair, Sunday, 18 October
Overcast. High 48°, low 38°.
0Upper St. Clair, Monday, 19 October
Clear. High 55°, low 34°.
0Upper St. Clair, Tuesday, 20 October
Mostly clear. High 60°, low 38°.
0Upper St. Clair, Wednesday, 21 October
Overcast. High 64°, low 42°.
0.07Upper St. Clair, Thursday, 22 October
Light rain. High 55°, low 47°.
0Upper St. Clair, Friday, 23 October
Overcast. High 64°, low 48°.
0.12
Upper St. Clair, Saturday, 24 October
Climate normal for this date — 60-year average.
0.13
Upper St. Clair, Sunday, 25 October
Climate normal for this date — 60-year average.
0.1Upper St. Clair, Monday, 26 October
Climate normal for this date — 60-year average.
0.11Upper St. Clair, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.13Upper St. Clair, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.17Upper St. Clair, Thursday, 29 October
Climate normal for this date — 60-year average.
0.13Upper St. Clair, Friday, 30 October
Climate normal for this date — 60-year average.
0.13Upper St. Clair, Saturday, 31 October
Climate normal for this date — 60-year average.
0.11Upper St. Clair, Sunday, 1 November
Climate normal for this date — 60-year average.
0.14Upper St. Clair, Monday, 2 November
Climate normal for this date — 60-year average.
0.08Upper St. Clair, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.13Upper St. Clair, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.11Upper St. Clair, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09Upper St. Clair, Friday, 6 November
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 Upper St. Clair, 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 Upper St. Clair, 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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