National Weather Service Forecast for: Mount Lebanon PA
Issued by: National Weather Service Pittsburgh, PA
Updated: 1:05 pm EDT Jun 22, 2025
 
This
Afternoon
This Afternoon: Sunny and hot, with a high near 93. Heat index values as high as 101. West wind around 10 mph.
Hot

 Tonight

Tonight: Mostly clear, with a low around 74. Southwest wind 3 to 6 mph.
Mostly Clear

 Monday

Monday: Sunny and hot, with a high near 94. Heat index values as high as 100. Calm wind becoming west around 6 mph in the afternoon.
Hot

 Monday
Night
Monday Night: Mostly clear, with a low around 74. Light west wind.
Mostly Clear

 Tuesday

Tuesday: Sunny and hot, with a high near 94. Calm wind becoming west 5 to 7 mph in the afternoon.
Hot

 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 74.
Partly Cloudy

 Wednesday

Wednesday: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92. Chance of precipitation is 40%.
Mostly Sunny
then Chance
T-storms
 Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Chance
T-storms then
Partly Cloudy
 Thursday

Thursday: Showers likely and possibly a thunderstorm after 2pm. Mostly sunny and hot, with a high near 91. Chance of precipitation is 60%.
Mostly Sunny
then Showers
Likely
Hi 93 °F Lo 74 °F Hi 94 °F Lo 74 °F Hi 94 °F Lo 74 °F Hi 92 °F Lo 73 °F Hi 91 °F

Air Quality Alert
Hazardous Weather Outlook
Extreme Heat Warning
 

This Afternoon
 
 Sunny and hot, with a high near 93. Heat index values as high as 101. West wind around 10 mph.
Tonight
 
 Mostly clear, with a low around 74. Southwest wind 3 to 6 mph.
Monday
 
 Sunny and hot, with a high near 94. Heat index values as high as 100. Calm wind becoming west around 6 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 74. Light west wind.
Tuesday
 
 Sunny and hot, with a high near 94. Calm wind becoming west 5 to 7 mph in the afternoon.
Tuesday Night
 
 Partly cloudy, with a low around 74.
Wednesday
 
 A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92. Chance of precipitation is 40%.
Wednesday Night
 
 A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Thursday
 
 Showers likely and possibly a thunderstorm after 2pm. Mostly sunny and hot, with a high near 91. Chance of precipitation is 60%.
Thursday Night
 
 Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 73. Chance of precipitation is 60%.
Friday
 
 Showers likely and possibly a thunderstorm. Mostly sunny and hot, with a high near 91. Chance of precipitation is 60%.
Friday Night
 
 Showers and thunderstorms likely. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.
Saturday
 
 Showers likely and possibly a thunderstorm. Partly sunny, with a high near 87. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Mount Lebanon PA.