National Weather Service Forecast for: 2 Miles WSW Irwin PA
Issued by: National Weather Service Pittsburgh, PA
Updated: 2:21 am EDT Aug 20, 2026
 
Overnight

Overnight: A chance of showers, then showers likely and possibly a thunderstorm after 5am. Cloudy, with a low around 63. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely

 Thursday

Thursday: Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms, mainly between 1pm and 5pm. High near 75. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Showers

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 61. Northeast wind 3 to 6 mph.
Partly Cloudy

 Friday

Friday: A chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 79. East wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Mostly Sunny
then Chance
T-storms
 Friday
Night
Friday Night: A slight chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Partly cloudy, with a low around 63. East wind around 5 mph becoming calm after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers

 Saturday

Saturday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 40%.
Partly Sunny
then Chance
T-storms
 Saturday
Night
Saturday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Chance
T-storms then
Chance
Showers
 Sunday

Sunday: A chance of showers after 8am. Partly sunny, with a high near 76. Chance of precipitation is 40%.
Chance
Showers

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 56.
Partly Cloudy
Lo 63 °F Hi 75 °F Lo 61 °F Hi 79 °F Lo 63 °F Hi 80 °F Lo 61 °F Hi 76 °F Lo 56 °F

Hazardous Weather Outlook
 

Overnight
 
 A chance of showers, then showers likely and possibly a thunderstorm after 5am. Cloudy, with a low around 63. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
 
 Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms, mainly between 1pm and 5pm. High near 75. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Thursday Night
 
 Partly cloudy, with a low around 61. Northeast wind 3 to 6 mph.
Friday
 
 A chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 79. East wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
 
 A slight chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Partly cloudy, with a low around 63. East wind around 5 mph becoming calm after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
 
 A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 40%.
Saturday Night
 
 A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Sunday
 
 A chance of showers after 8am. Partly sunny, with a high near 76. Chance of precipitation is 40%.
Sunday Night
 
 Partly cloudy, with a low around 56.
Monday
 
 Mostly sunny, with a high near 75.
Monday Night
 
 Partly cloudy, with a low around 56.
Tuesday
 
 Mostly sunny, with a high near 78.
Tuesday Night
 
 Partly cloudy, with a low around 58.
Wednesday
 
 Partly sunny, with a high near 80.

 

Forecast from NOAA-NWS for 2 Miles WSW Irwin PA.