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September 18th, 2025 :: 5:51 pm EDT   

Local Weather Report for
South Williamsport
Pennsylvania, United States

 Current South Williamsport Weather Conditions Updated September 18th at 4:54 pm 
Temperature:88°F Dew Point:46°F
Barometer:29.92 inHg Wind:N 15 Mph
Humidity:23.9% Visibility:0M
 
 South Williamsport Weather Forecast Summary  
 
Today
Sep 18th
Friday
Sep 19th
Saturday
Sep 20th
Sunday
Sep 21st
Monday
Sep 22nd
Mix of Cloud and Sun Sunny Mix of Sun and Cloud Cloudy Cloudy
81°F
79°F
52°F
75°F
48°F
71°F
50°F
79°F
55°F
 
 South Williamsport Detailed Weather Forecast  
 
Thursday, September 18th, 2025
Evening Temperature: 60°F
Clear.
Friday, September 19th, 2025
Overnight Temperature: 57°F
Clear.
Morning Temperature: 77°F
Sunny.
Afternoon Temperature: 69°F
Sunny.
Evening Temperature: 54°F
Clear.
Saturday, September 20th, 2025
Overnight Temperature: 49°F
Clear.
Morning Temperature: 71°F
Sunny.
Afternoon Temperature: 68°F
Sunny.
Evening Temperature: 54°F
A mix of clear and cloudy skies.
Sunday, September 21st, 2025
Overnight Temperature: 52°F
A mix of cloudy and clear skies.
Morning Temperature: 68°F
A mix of cloud and sun.
Afternoon Temperature: 65°F
Cloudy.
Evening Temperature: 61°F
Cloudy.
Monday, September 22nd, 2025
Overnight Temperature: 55°F
Cloudy.
Morning Temperature: 71°F
Sunny with cloudy periods.
Afternoon Temperature: 72°F
A mix of cloud and sun.
Evening Temperature: 61°F
A mix of cloudy and clear skies.
Tuesday, September 23rd, 2025
Overnight Temperature: 59°F
A mix of cloudy and clear skies.
Morning Temperature: 80°F
Cloudy. Slight chance of a thunderstorm.
Afternoon Temperature: 79°F
Sunny with cloudy periods. Slight chance of a thunderstorm.
Evening Temperature: 67°F
Clear with cloudy periods.
Wednesday, September 24th, 2025
Overnight Temperature: 64°F
Clear.
Morning Temperature: 85°F
Sunny.
Afternoon Temperature: 79°F
A mix of cloud and sun. Slight chance of a thunderstorm.
Evening Temperature: 65°F
Cloudy with a chance of showers.
Thursday, September 25th, 2025
Overnight Temperature: 63°F
Cloudy.
Morning Temperature: 71°F
Cloudy with a chance of showers.
Afternoon Temperature: 63°F
Cloudy with a chance of showers.
Evening Temperature: 63°F
Cloudy with clear periods.
Friday, September 26th, 2025
Overnight Temperature: 64°F
Cloudy with a few showers.
Morning Temperature: 68°F
Cloudy with a chance of showers or thundershowers. Windy at times.
Afternoon Temperature: 66°F
Cloudy with a chance of showers or thundershowers.
Evening Temperature: 64°F
Cloudy with showers likely. Slight chance of a thunderstorm.





 

  [ Local Weather Report ]
Duboistown, PA 
4:54 PM  88°F
 
 
Williamsport, PA 
4:54 PM  88°F
 
 
Montoursville, PA 
4:54 PM  88°F
 
 
Montgomery, PA 
4:54 PM  88°F
 
 
Muncy, PA 
4:54 PM  88°F
 
 
Salladasburg, PA 
 
Watsontown, PA 
4:54 PM  88°F
 
 
Warrior Run, PA 
4:54 PM  88°F
 
 
Hughesville, PA 
4:54 PM  88°F
 
 
Jersey Shore, PA 

This WeatherCity Weather Forecast for South Williamsport, Pennsylvania, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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