Keystone, Pennsylvania Weather
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Weather Forecast for Keystone, Pennsylvania : Perry County
Issued: 1:05 pm EDT Sep 4, 2025 Latitude: 40.3261981 Longitude: -77.0549782 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
60% chance of thunderstorms on This Afternoon 60% chance of thunderstorms on Tonight Mostly Sunny on Friday 80% chance of thunderstorms on Saturday Mostly Sunny on Sunday Sunny on Monday Sunny on Tuesday Sunny on Wednesday Mostly Sunny on Thursday
High: 82°F Low: 60°F High: 83°F High: 80°F High: 73°F High: 71°F High: 73°F High: 75°F High: 77°F
Low: 64°F Low: 54°F Low: 48°F Low: 47°F Low: 48°F Low: 51°F  
Thunderstorms Thunderstorms Mostly Sunny Thunderstorms Mostly Sunny Sunny Sunny Sunny Mostly Sunny
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Current Conditions at
HARRISBURG - (KCXY)
77°
Mostly Clear
as of 3:56 PM EDST
Rel. Humidity: 69%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 29.74 in.
Flight Rule: VFR
Wind Data
7 MPH
190° South
Cloud Level(s): Few at 10000ft, Few at 12000ft
Current Conditions at
MIDDLETWN/HARRISB - (KMDT)
75°
Cloudy
Light Rain
as of 3:56 PM EDST
Rel. Humidity: 73%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 29.74 in.
Flight Rule: VFR
Wind Data
5 MPH
130° Southeast
Cloud Level(s): Scattered at 4900ft, Broken at 8500ft, Solid Overcast at 11000ft
Current Conditions at
COLLEGE PARK ARPT - (KCGS)
72°
Cloudy
Rain Mist
as of 4:05 PM EDST
Rel. Humidity: 88%
Dew Point: 68°F
Visibility: 7 Miles
Pressure: 29.78 in.
Flight Rule: VFR
Wind Data
9 MPH
Gust: 18 MPH
160° South
Cloud Level(s): Scattered at 2200ft, Scattered at 6500ft, Solid Overcast at 11000ft
60% chance of thunderstorms This Afternoon This Afternoon... Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 82. South wind 7 to 9 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
60% chance of thunderstorms Tonight Tonight... Showers and thunderstorms likely, mainly before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 60. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 83. Calm wind becoming southwest 5 to 9 mph in the morning.
Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 64. South wind 3 to 6 mph.
80% chance of thunderstorms Saturday Saturday... A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 80. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
80% chance of thunderstorms Saturday Night Saturday Night... Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Low around 54. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 73.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 48.
Sunny on Monday Monday... Sunny, with a high near 71.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 47.
Sunny on Tuesday Tuesday... Sunny, with a high near 73.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 48.
Sunny on Wednesday Wednesday... Sunny, with a high near 75.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 51.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 77.
Sun Almanac for Keystone, Pennsylvania
Sunrise: 06:39 AM
Sunset: 7:35 PM
Civil Sunrise:06:11 AM
Civil Sunset: 8:03 PM
Nautical Sunrise: 05:38 AM
Nautical Sunset: 8:36 PM
Astro Sunrise: 05:04 AM
Astro Sunset: 9:10 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.