National Weather Service Forecast for: Mount Lebanon PA
Issued by: National Weather Service Pittsburgh, PA
Updated: 2:21 pm EDT Jul 28, 2026
 
This
Afternoon
This Afternoon: A chance of showers and thunderstorms, mainly before 5pm. Partly sunny, with a high near 81. Northwest wind around 11 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms
 Tonight

Tonight: Partly cloudy, with a low around 63. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.
Partly Cloudy

 Wednesday

Wednesday: Mostly sunny, with a high near 78. Northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 60. Northwest wind 7 to 13 mph.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 81. Northwest wind 7 to 11 mph.
Sunny

 Thursday
Night
Thursday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 60.
Mostly Clear
then Patchy
Fog
 Friday

Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 84.
Patchy Fog
then Mostly
Sunny
 Friday
Night
Friday Night: Partly cloudy, with a low around 65.
Partly Cloudy

 Saturday

Saturday: Mostly cloudy, with a high near 85.
Mostly Cloudy
Hi 81 °F Lo 63 °F Hi 78 °F Lo 60 °F Hi 81 °F Lo 60 °F Hi 84 °F Lo 65 °F Hi 85 °F

 

This Afternoon
 
 A chance of showers and thunderstorms, mainly before 5pm. Partly sunny, with a high near 81. Northwest wind around 11 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
 
 Partly cloudy, with a low around 63. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.
Wednesday
 
 Mostly sunny, with a high near 78. Northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
 
 Mostly clear, with a low around 60. Northwest wind 7 to 13 mph.
Thursday
 
 Sunny, with a high near 81. Northwest wind 7 to 11 mph.
Thursday Night
 
 Patchy fog after 5am. Otherwise, mostly clear, with a low around 60.
Friday
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 84.
Friday Night
 
 Partly cloudy, with a low around 65.
Saturday
 
 Mostly cloudy, with a high near 85.
Saturday Night
 
 A chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Sunday
 
 Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.
Sunday Night
 
 Showers and thunderstorms likely. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Monday
 
 A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Mount Lebanon PA.