Saint Clair, Pennsylvania Weather
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Weather Forecast for Saint Clair, Pennsylvania : Westmoreland County
Issued: 1:18 am EDT Jul 4, 2025 Latitude: 40.2686808 Longitude: -79.548373 View on Google Maps

MouseOver for Detail Forecast
Overnight Independence Day Saturday Sunday Monday Tuesday Wednesday Thursday
Morning Fog on Overnight Sunny on Independence Day Sunny on Saturday Sunny on Sunday 40% chance of thunderstorms on Monday 40% chance of on Tuesday 30% chance of thunderstorms on Wednesday 60% chance of thunderstorms on Thursday
Low: 58°F High: 83°F High: 88°F High: 91°F High: 89°F High: 84°F High: 85°F High: 83°F
Low: 61°F Low: 66°F Low: 69°F Low: 68°F Low: 65°F Low: 65°F  
Morning Fog Sunny Sunny Sunny Thunderstorms Partly Sunny Thunderstorms Thunderstorms
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Current Conditions at
LATROBE - (KLBE)
61°
Clear
as of 2:55 AM EDST
Rel. Humidity: 93%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
ALLEGHENY COUNTY ARPT - (KAGC)
66°
Clear
as of 2:53 AM EDST
Rel. Humidity: 63%
Dew Point: 54°F
Visibility: 9 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
5 MPH
050° Northeast
Cloud Level(s): Clear
Current Conditions at
STEWART FIELD - (KIDI)
57°
Mostly Cloudy
as of 2:55 AM EDST
Rel. Humidity: 93%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.11 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Broken at 5500ft
Current Conditions at
JOHNSTOWN - (KJST)
63°
Clear
as of 2:54 AM EDST
Rel. Humidity: 67%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 30.14 in.
Flight Rule: VFR
Wind Data
5 MPH
350° North
Cloud Level(s): Clear
Morning Fog on Overnight Overnight... Patchy fog after 5am. Otherwise, mostly clear, with a low around 58. Calm wind.
Sunny on Independence Day Independence Day... Sunny, with a high near 83. Calm wind.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 61. Calm wind.
Sunny on Saturday Saturday... Sunny, with a high near 88. Calm wind.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 66. Calm wind.
Sunny on Sunday Sunday... Sunny and hot, with a high near 91.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 69.
40% chance of thunderstorms Monday Monday... A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
30% chance of thunderstorms Monday Night Monday Night... A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
40% chance of Tuesday Tuesday... A chance of showers after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.
30% chance of rain Tuesday Night Tuesday Night... A chance of showers. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
30% chance of thunderstorms Wednesday Wednesday... A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
30% chance of thunderstorms Wednesday Night Wednesday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
60% chance of thunderstorms Thursday Thursday... Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Current Radar Image


Sun Almanac for Saint Clair, Pennsylvania
Sunrise: 05:54 AM
Sunset: 8:51 PM
Civil Sunrise:05:21 AM
Civil Sunset: 9:24 PM
Nautical Sunrise: 04:40 AM
Nautical Sunset: 10:05 PM
Astro Sunrise: 03:52 AM
Astro Sunset: 10:54 PM
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