Weather World
Borough of Irwin, PAIrwin, PA 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Irwin, PA Weather Forecast
Irwin, PA Weather Forecast Date: 502 AM EDT Thu Oct 01 2026
The area/counties/county of: Westmoreland, including the cities of: Murrysville, Greensburg, New Kensington, Lower Burrell, Latrobe, and Monessen.or toggle through each period.
Today... Partly cloudy. Unseasonably warm with highs in the lower 80s. Southwest winds 10 to 15 mph.
Tonight... Partly cloudy. Mild. Lows in the mid 60s. Southwest winds 10 to 15 mph.
Friday... A slight chance of showers in the morning, then showers in the afternoon. Warm with highs in the mid 70s. Temperatures falling into the mid 60s in the afternoon. Southwest winds 10 to 15 mph, becoming northwest in the afternoon. Chance of rain near 100%.
Friday Night... Mostly cloudy with showers likely in the evening, then partly cloudy after midnight. Much cooler with lows in the mid 40s. North winds 10 to 15 mph, diminishing to around 5 mph after midnight. Chance of rain 70%.
Saturday... Mostly sunny. Highs in the upper 60s. Northeast winds 5 to 10 mph.
Saturday Night... Mainly clear. Lows in the upper 40s.
Sunday... Partly sunny in the morning, then becoming mostly cloudy. Highs in the upper 60s.
Sunday Night... Mostly cloudy in the evening, then becoming partly cloudy. Lows around 50.
Monday... Partly cloudy. Highs in the mid 60s.
Monday Night... Mainly clear. Lows in the upper 30s.
Tuesday... Mostly sunny. Highs around 60.
Tuesday Night... Clear. Lows in the upper 30s.
POP = Probability of Precipitation
Irwin Radar Loop
Use the map search tool if you want to place a location marker on the radar map...