Weather in South Fayette, PA
South Fayette, Sunday, 9 August, 13:46
Clear. Feels like 87°. High 85°, low 67°.
Monthly outlook for South Fayette, PA: average high 77.2°, average low 59.5°. That is 1.2° below the climate normal for August. Precipitation is expected on 6 days (about 3.2 inches), against a normal of 6 days and 2.1 inches. The warmest day looks like 9 August (84.9°), the coolest 21 August (52.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 78.2° | 79.8° | -0.9° |
| 19 August – 28 August | 75.6° | 79.2° | -2° |
| 29 August – 7 September | at normal | 77.7° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Mount Lebanon (6 mi).
1.34
South Fayette, Monday, 10 August
Heavy rain. High 85°, low 67°.
0.67South Fayette, Tuesday, 11 August
Heavy rain. High 82°, low 64°.
0.5South Fayette, Wednesday, 12 August
Heavy rain. High 79°, low 65°.
0
South Fayette, Thursday, 13 August
Mostly clear. High 78°, low 63°.
0
South Fayette, Friday, 14 August
Overcast. High 75°, low 59°.
0South Fayette, Saturday, 15 August
Overcast. High 73°, low 53°.
0.05South Fayette, Sunday, 16 August
Light rain. High 73°, low 54°.
0South Fayette, Monday, 17 August
Light rain. High 74°, low 61°.
0South Fayette, Tuesday, 18 August
Overcast. High 79°, low 57°.
0.09South Fayette, Wednesday, 19 August
Light rain. High 80°, low 62°.
0South Fayette, Thursday, 20 August
Overcast. High 70°, low 58°.
0South Fayette, Friday, 21 August
Overcast. High 75°, low 53°.
0.5South Fayette, Saturday, 22 August
Rain. High 84°, low 58°.
0.02South Fayette, Sunday, 23 August
Light rain. High 70°, low 58°.
0South Fayette, Monday, 24 August
Clear. High 74°, low 53°.
0.09
South Fayette, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.09South Fayette, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13
South Fayette, Thursday, 27 August
Climate normal for this date — 60-year average.
0.19South Fayette, Friday, 28 August
Climate normal for this date — 60-year average.
0.13South Fayette, Saturday, 29 August
Climate normal for this date — 60-year average.
0.14South Fayette, Sunday, 30 August
Climate normal for this date — 60-year average.
0.16South Fayette, Monday, 31 August
Climate normal for this date — 60-year average.
0.1South Fayette, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.13South Fayette, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.1South Fayette, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09South Fayette, Friday, 4 September
Climate normal for this date — 60-year average.
0.11South Fayette, Saturday, 5 September
Climate normal for this date — 60-year average.
0.14South Fayette, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11South Fayette, Monday, 7 September
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 South Fayette, 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 South Fayette, 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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