National Weather Service Forecast for: Mount Lebanon PA
Issued by: National Weather Service Pittsburgh, PA
Updated: 2:21 pm EDT Mar 19, 2026
 
This
Afternoon
This Afternoon: A slight chance of rain before 5pm. Partly sunny, with a high near 53. West wind around 7 mph. Chance of precipitation is 20%.
Slight Chance
Rain

 Tonight

Tonight: Mostly cloudy, with a low around 37. Light and variable wind becoming south around 5 mph after midnight.
Mostly Cloudy

 Friday

Friday: Rain likely and possibly a thunderstorm, mainly after 5pm. Mostly cloudy, with a high near 61. South wind 9 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Mostly Cloudy
then Rain
Likely
 Friday
Night
Friday Night: Rain and thunderstorms likely before 11pm, then a chance of rain between 11pm and 2am. Mostly cloudy, with a low around 41. West wind 6 to 9 mph becoming northwest after midnight. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Rain Likely

 Saturday

Saturday: Partly sunny, with a high near 62. North wind around 5 mph becoming west in the afternoon.
Partly Sunny

 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 46.
Mostly Cloudy

 Sunday

Sunday: A chance of rain after 2pm. Mostly sunny, with a high near 74. Chance of precipitation is 30%.
Mostly Sunny
then Chance
Rain
 Sunday
Night
Sunday Night: Rain likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Rain Likely

 Monday

Monday: A chance of rain before 8am. Partly sunny, with a high near 46. Breezy. Chance of precipitation is 30%.
Chance Rain
then Partly
Sunny and
Breezy
Hi 53 °F Lo 37 °F Hi 61 °F Lo 41 °F Hi 62 °F Lo 46 °F Hi 74 °F Lo 40 °F Hi 46 °F

 

This Afternoon
 
 A slight chance of rain before 5pm. Partly sunny, with a high near 53. West wind around 7 mph. Chance of precipitation is 20%.
Tonight
 
 Mostly cloudy, with a low around 37. Light and variable wind becoming south around 5 mph after midnight.
Friday
 
 Rain likely and possibly a thunderstorm, mainly after 5pm. Mostly cloudy, with a high near 61. South wind 9 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
 
 Rain and thunderstorms likely before 11pm, then a chance of rain between 11pm and 2am. Mostly cloudy, with a low around 41. West wind 6 to 9 mph becoming northwest after midnight. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
 
 Partly sunny, with a high near 62. North wind around 5 mph becoming west in the afternoon.
Saturday Night
 
 Mostly cloudy, with a low around 46.
Sunday
 
 A chance of rain after 2pm. Mostly sunny, with a high near 74. Chance of precipitation is 30%.
Sunday Night
 
 Rain likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Monday
 
 A chance of rain before 8am. Partly sunny, with a high near 46. Breezy. Chance of precipitation is 30%.
Monday Night
 
 Partly cloudy, with a low around 27.
Tuesday
 
 Mostly sunny, with a high near 50.
Tuesday Night
 
 Mostly cloudy, with a low around 35.
Wednesday
 
 Partly sunny, with a high near 52.

 

Forecast from NOAA-NWS for Mount Lebanon PA.