National Weather Service Forecast for: Mount Lebanon PA
Issued by: National Weather Service Pittsburgh, PA
Updated: 12:36 pm EDT May 4, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 72. Southwest wind around 16 mph, with gusts as high as 26 mph.
Sunny

 Tonight

Tonight: Scattered showers and thunderstorms, mainly between 11pm and 4am. Partly cloudy, with a low around 59. Southwest wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Scattered
Showers
 Tuesday

Tuesday: Scattered showers, mainly before 1pm. Partly sunny, with a high near 76. Southwest wind 16 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Scattered
Showers
 Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms, then showers after 11pm. Low around 54. South wind 8 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Chance
Showers then
Showers
 Wednesday

Wednesday: Showers, with thunderstorms also possible after 2pm. High near 61. South wind around 11 mph becoming northwest in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Showers

 Wednesday
Night
Wednesday Night: A chance of showers. Mostly cloudy, with a low around 42. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Chance
Showers
 Thursday

Thursday: A chance of showers after 2pm. Partly sunny, with a high near 57. Chance of precipitation is 40%.
Partly Sunny
then Chance
Showers
 Thursday
Night
Thursday Night: A chance of showers before 8pm. Partly cloudy, with a low around 39. Chance of precipitation is 30%.
Chance
Showers then
Partly Cloudy
 Friday

Friday: Mostly sunny, with a high near 60.
Mostly Sunny
Hi 72 °F Lo 59 °F Hi 76 °F Lo 54 °F Hi 61 °F Lo 42 °F Hi 57 °F Lo 39 °F Hi 60 °F

 

This Afternoon
 
 Sunny, with a high near 72. Southwest wind around 16 mph, with gusts as high as 26 mph.
Tonight
 
 Scattered showers and thunderstorms, mainly between 11pm and 4am. Partly cloudy, with a low around 59. Southwest wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Tuesday
 
 Scattered showers, mainly before 1pm. Partly sunny, with a high near 76. Southwest wind 16 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 A chance of showers and thunderstorms, then showers after 11pm. Low around 54. South wind 8 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
 
 Showers, with thunderstorms also possible after 2pm. High near 61. South wind around 11 mph becoming northwest in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
 
 A chance of showers. Mostly cloudy, with a low around 42. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
 
 A chance of showers after 2pm. Partly sunny, with a high near 57. Chance of precipitation is 40%.
Thursday Night
 
 A chance of showers before 8pm. Partly cloudy, with a low around 39. Chance of precipitation is 30%.
Friday
 
 Mostly sunny, with a high near 60.
Friday Night
 
 A chance of showers after 2am. Mostly cloudy, with a low around 45. Chance of precipitation is 30%.
Saturday
 
 A chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 40%.
Saturday Night
 
 Partly cloudy, with a low around 44.
Sunday
 
 A chance of showers. Mostly sunny, with a high near 66. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Mount Lebanon PA.