National Weather Service Forecast for: Harrisburg PA
Issued by: National Weather Service State College, PA
Updated: 4:01 am EDT Aug 20, 2026
 
Today

Today: Showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Some of the storms could produce heavy rainfall. High near 76. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Chance
Showers then
Heavy Rain
 Tonight

Tonight: A chance of showers, mainly before 7pm. Mostly cloudy, with a low around 63. Light north wind. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Chance
Showers then
Partly Cloudy
 Friday

Friday: Mostly sunny, with a high near 80. Light and variable wind.
Mostly Sunny

 Friday
Night
Friday Night: A slight chance of showers, then a chance of showers and thunderstorms after 11pm. Increasing clouds, with a low around 66. Calm wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Slight Chance
T-storms then
Chance
Showers
 Saturday

Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 80. Light east wind. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Showers
Likely
 Saturday
Night
Saturday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers
Likely

 Sunday

Sunday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
Mostly Sunny
then Chance
T-storms
 Sunday
Night
Sunday Night: A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 62. Chance of precipitation is 30%.
Chance
T-storms then
Mostly Clear
 Monday

Monday: Sunny, with a high near 79.
Sunny
Hi 76 °F Lo 63 °F Hi 80 °F Lo 66 °F Hi 80 °F Lo 66 °F Hi 81 °F Lo 62 °F Hi 79 °F

 

Today
 
 Showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Some of the storms could produce heavy rainfall. High near 76. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
 
 A chance of showers, mainly before 7pm. Mostly cloudy, with a low around 63. Light north wind. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
 
 Mostly sunny, with a high near 80. Light and variable wind.
Friday Night
 
 A slight chance of showers, then a chance of showers and thunderstorms after 11pm. Increasing clouds, with a low around 66. Calm wind. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
 
 A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 80. Light east wind. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
 Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
 
 A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
Sunday Night
 
 A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 62. Chance of precipitation is 30%.
Monday
 
 Sunny, with a high near 79.
Monday Night
 
 Mostly clear, with a low around 60.
Tuesday
 
 Sunny, with a high near 80.
Tuesday Night
 
 Partly cloudy, with a low around 63.
Wednesday
 
 A chance of showers. Mostly sunny, with a high near 82. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Harrisburg PA.