Saint Clair, PA Weather Forecast
Local 7-day forecast
Mostly Sunny then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Clair, PA in one place.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for 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: Jul 15, 2026 12:33 AM EDT.
The active forecast window currently covers Jul 17 to Jul 21, 2026 for Saint Clair, PA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 17 to Jul 21, 2026
- Latest sync
- Jul 15, 2026 12:33 AM EDT
- Forecast office
- PBZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Clair
Friday looks like the warmest upcoming period in Saint Clair at 90 degrees F.
Sunday Night is the coolest period ahead with temperatures near 67 degrees F.
The strongest winds are forecast for Tuesday at about 10 to 15 mph SW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 15, 2026 12:33 AM EDT
- Coverage
- 5 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 chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 8am, then showers and thunderstorms. Mostly cloudy, with a high near 86. Chance of precipitation is 80%.
Showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 80%.
A chance of rain showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
A chance of rain showers before 2pm, then showers and thunderstorms likely. Partly sunny, with a high near 83.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 17
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
90°F |
1 to 6 mph
SE
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms
|
71°F |
6 mph
SE
|
|
Saturday
Jul 18
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
86°F |
5 to 12 mph
SW
|
|
Saturday Night
Jul 18
|
Showers And Thunderstorms
|
70°F |
9 mph
SW
|
|
Sunday
Jul 19
|
Chance Showers And Thunderstorms
|
84°F |
10 mph
W
|
|
Sunday Night
Jul 19
|
Chance Showers And Thunderstorms
|
67°F |
3 to 9 mph
W
|
|
Monday
Jul 20
|
Chance Showers And Thunderstorms
|
86°F |
3 to 9 mph
SW
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
68°F |
10 mph
SW
|
|
Tuesday
Jul 21
|
Showers And Thunderstorms Likely
|
83°F |
10 to 15 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Clair.