7-Day Forecast 39.87°N 77.95°W (Text-Only)
NWS Forecast for: 3 Miles NW Mercersburg PA
Issued by: National Weather Service State College, PA
Last Update: 4:34 pm EDT Jul 13, 2025




This Afternoon: A chance of showers and thunderstorms. Mostly cloudy, with a high near 87. South wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely, mainly before 2am. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 70. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Monday: Showers and thunderstorms. Patchy fog before 9am. High near 84. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Monday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday: Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 85. Calm wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday Night: Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday: Showers and thunderstorms likely after 2pm. Mostly cloudy, with a high near 87. Chance of precipitation is 70%.

Wednesday Night: Showers and thunderstorms likely before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.

Thursday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 60%.

Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.

Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 50%.

Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.

Saturday: A chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 40%.

Saturday Night: A chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.

Sunday: A chance of showers and thunderstorms. Partly sunny, with a high near 85.



3 Miles NW Mercersburg PA
 39.87°N 77.95°W (Elev. 997 ft)

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