Weather forecast for: South Mountain PA
Last Update: 3:31 pm EDT Aug 5, 2026
This Afternoon: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 79. Light southeast wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight: Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, with a low around 66. Light southeast wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday: A chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 84. Southwest wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night: Showers and thunderstorms likely before 11pm, then a chance of showers. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday: A slight chance of showers before 8am, then showers and possibly a thunderstorm after 2pm. High near 83. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night: Showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Low around 64. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Saturday Night: A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Sunday: Mostly sunny, with a high near 82.
Sunday Night: Partly cloudy, with a low around 64.
Monday: Mostly sunny, with a high near 84.
Monday Night: A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 50%.
Wednesday: A chance of showers. Partly sunny, with a high near 78.
WeatherWorld.com
