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Irwin, Pennsylvania Weather Forecast
Irwin, Pennsylvania Weather
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Weather Forecast for Irwin, Pennsylvania : Westmoreland County
Issued: 5:56 pm EST Dec 25, 2025 Latitude: 40.3245138 Longitude: -79.7011549 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday Monday Tuesday Wednesday New Year's Day
Mostly Cloudy on Tonight 90% chance of freezing rain on Friday Mostly Cloudy on Saturday 80% chance of rain on Sunday 80% chance of rain & snow on Monday Mostly Cloudy on Tuesday Mostly Cloudy on Wednesday Mostly Cloudy on New Year's Day
Low: 28°F High: 46°F High: 42°F High: 58°F High: 53°F High: 28°F High: 32°F High: 32°F
Low: 36°F Low: 32°F Low: 40°F Low: 20°F Low: 21°F Low: 22°F  
Mostly Cloudy Freezing Rain Mostly Cloudy Rain Rain & Snow Mostly Cloudy Mostly Cloudy Mostly Cloudy
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Current Conditions at
ALLEGHENY COUNTY ARPT - (KAGC)
36°
Clear
as of 6:53 PM EST
Rel. Humidity: 74%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
6 MPH
350° North
Cloud Level(s): Clear
Current Conditions at
LATROBE - (KLBE)
39°
Feels like 31°F
Clear
as of 6:57 PM EST
Rel. Humidity: 60%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
13 MPH
0° North
Cloud Level(s): Clear
Current Conditions at
PITTSBURGH - (KPIT)
36°
Feels like 28°F
Mostly Cloudy
as of 6:51 PM EST
Rel. Humidity: 74%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
9 MPH
0° North
Cloud Level(s): Few at 16000ft, Broken at 21000ft
Current Conditions at
BUTLER COUNTY - (KBTP)
36°
Clear
as of 6:56 PM EST
Rel. Humidity: 69%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: VFR
Wind Data
5 MPH
340° North
Cloud Level(s): Clear
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 28. Northeast wind 3 to 6 mph.
90% chance of freezing rain Friday Friday... A slight chance of freezing rain before 10am, then rain. Some thunder is also possible. High near 46. East wind 7 to 11 mph becoming south in the afternoon. Chance of precipitation is 90%. Little or no ice accumulation expected.
80% chance of thunderstorms Friday Night Friday Night... Rain and possibly a thunderstorm. Low around 36. Southeast wind 6 to 8 mph becoming northwest in the evening. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 42. Northwest wind around 6 mph becoming calm in the morning.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 32. Light east wind.
80% chance of rain Sunday Sunday... Rain, mainly after 1pm. High near 58. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
90% chance of rain Sunday Night Sunday Night... Rain. Low around 40. Chance of precipitation is 90%.
80% chance of rain & snow Monday Monday... Rain before 1pm, then a chance of rain and snow. High near 53. Breezy. Chance of precipitation is 80%.
50% chance of snow Monday Night Monday Night... A chance of snow. Cloudy, with a low around 20. Breezy. Chance of precipitation is 50%.
Mostly Cloudy on Tuesday Tuesday... Mostly cloudy, with a high near 28. Breezy.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 21.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 32.
30% chance of snow Wednesday Night Wednesday Night... A chance of snow. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Mostly Cloudy on New Year's Day New Year's Day... Mostly cloudy, with a high near 32.
Current Radar Image


Sun Almanac for Irwin, Pennsylvania
Sunrise: 07:40 AM
Sunset: 4:58 PM
Civil Sunrise:07:09 AM
Civil Sunset: 5:29 PM
Nautical Sunrise: 06:35 AM
Nautical Sunset: 6:03 PM
Astro Sunrise: 06:02 AM
Astro Sunset: 6:36 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.