National Weather Service Forecast for: Bethel Park 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. Mostly cloudy, with a low around 64. 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. Some of the storms could produce heavy rainfall. High near 75. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Heavy Rain
then Showers
Likely
 Thursday
Night
Thursday Night: A slight chance of showers before 9pm. Partly cloudy, with a low around 62. Northeast wind around 6 mph. Chance of precipitation is 20%.
Slight Chance
Showers then
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 slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 63. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Slight Chance
T-storms then
Slight 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 62. Chance of precipitation is 40%.
Chance
T-storms then
Chance
Showers
 Sunday

Sunday: A chance of showers after 2pm. Partly sunny, with a high near 76. Chance of precipitation is 30%.
Partly Sunny
then Chance
Showers
 Sunday
Night
Sunday Night: A chance of showers before 8pm. Partly cloudy, with a low around 57. Chance of precipitation is 30%.
Chance
Showers then
Partly Cloudy
Lo 64 °F Hi 75 °F Lo 62 °F Hi 79 °F Lo 63 °F Hi 80 °F Lo 62 °F Hi 76 °F Lo 57 °F

Hazardous Weather Outlook
 

Overnight
 
 A chance of showers, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 64. 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. Some of the storms could produce heavy rainfall. High near 75. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Thursday Night
 
 A slight chance of showers before 9pm. Partly cloudy, with a low around 62. Northeast wind around 6 mph. Chance of precipitation is 20%.
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 slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 63. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
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 62. Chance of precipitation is 40%.
Sunday
 
 A chance of showers after 2pm. Partly sunny, with a high near 76. Chance of precipitation is 30%.
Sunday Night
 
 A chance of showers before 8pm. Partly cloudy, with a low around 57. Chance of precipitation is 30%.
Monday
 
 Sunny, with a high near 75.
Monday Night
 
 Mostly clear, with a low around 57.
Tuesday
 
 Mostly sunny, with a high near 78.
Tuesday Night
 
 Partly cloudy, with a low around 60.
Wednesday
 
 Mostly sunny, with a high near 80.

 

Forecast from NOAA-NWS for Bethel Park PA.