Upper Saint Clair, PA Weather Forecast
Local 7-day forecast
Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Upper Saint Clair, PA in one place.
A chance of rain showers before 3pm. Mostly cloudy, with a high near 63. East wind around 15 mph. Chance of precipitation is 50%.
Local Weather Overview
This forecast page for Upper Saint Clair, PA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 22, 2026 10:59 AM EDT.
The active forecast window currently covers Sep 23 to Sep 28, 2026 for Upper Saint Clair, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 23 to Sep 28, 2026
- Latest sync
- Sep 22, 2026 10:59 AM EDT
- Forecast office
- PBZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Upper Saint Clair
Monday looks like the warmest upcoming period in Upper Saint Clair at 73 degrees F.
Thursday Night is the coolest period ahead with temperatures near 46 degrees F.
The strongest winds are forecast for Wednesday at about 15 mph E.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 22, 2026 10:59 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- PBZ
- Radar station
- KPBZ
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of rain showers between 8pm and 2am. Mostly cloudy, with a low around 50. East wind 8 to 14 mph. Chance of precipitation is 20%.
Partly sunny, with a high near 66. East wind around 12 mph.
Mostly clear, with a low around 46.
Sunny, with a high near 68.
Mostly clear, with a low around 47.
Sunny, with a high near 69.
Mostly clear, with a low around 49.
Sunny, with a high near 70.
Partly cloudy, with a low around 50.
Mostly sunny, with a high near 73.
Partly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 23
|
Chance Rain Showers
|
63°F |
15 mph
E
|
|
Wednesday Night
Sep 23
|
Slight Chance Rain Showers
|
50°F |
8 to 14 mph
E
|
|
Thursday
Sep 24
|
Partly Sunny
|
66°F |
12 mph
E
|
|
Thursday Night
Sep 24
|
Mostly Clear
|
46°F |
5 to 9 mph
NE
|
|
Friday
Sep 25
|
Sunny
|
68°F |
5 to 9 mph
NE
|
|
Friday Night
Sep 25
|
Mostly Clear
|
47°F |
5 to 9 mph
N
|
|
Saturday
Sep 26
|
Sunny
|
69°F |
6 to 13 mph
N
|
|
Saturday Night
Sep 26
|
Mostly Clear
|
49°F |
5 to 13 mph
N
|
|
Sunday
Sep 27
|
Sunny
|
70°F |
5 to 9 mph
NW
|
|
Sunday Night
Sep 27
|
Partly Cloudy
|
50°F |
2 to 8 mph
NW
|
|
Monday
Sep 28
|
Mostly Sunny
|
73°F |
5 mph
N
|
|
Monday Night
Sep 28
|
Partly Cloudy
|
54°F |
1 to 5 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Upper Saint Clair.
