Williamstown, Pennsylvania Weather
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Weather Forecast for Williamstown, Pennsylvania : Lehigh County
Issued: 4:09 pm EDT Sep 5, 2025 Latitude: 40.7442619 Longitude: -75.6249089 View on Google Maps

MouseOver for Detail Forecast
Tonight Saturday Sunday Monday Tuesday Wednesday Thursday Friday
Cloudy on Tonight 80% chance of thunderstorms on Saturday 30% chance of rain on Sunday Sunny on Monday Sunny on Tuesday Partly Sunny on Wednesday Mostly Sunny on Thursday Sunny on Friday
Low: 64°F High: 81°F High: 74°F High: 73°F High: 74°F High: 73°F High: 79°F High: 72°F
Low: 57°F Low: 48°F Low: 49°F Low: 51°F Low: 52°F Low: 50°F  
Cloudy Thunderstorms Rain Sunny Sunny Partly Sunny Mostly Sunny Sunny
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Current Conditions at
ALLENTOWN - (KABE)
77°
Clear
as of 9:51 PM EDST
Rel. Humidity: 65%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 29.94 in.
Flight Rule: VFR
Wind Data
6 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
QUAKERTOWN - (KUKT)
73°
Clear
as of 10:35 PM EDST
Rel. Humidity: 83%
Dew Point: 68°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
POCONO MNTS MUNICIPAL AP - (KMPO)
70°
Clear
as of 9:53 PM EDST
Rel. Humidity: 77%
Dew Point: 63°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
10 MPH
Gust: 23 MPH
190° South
Cloud Level(s): Clear
Current Conditions at
READING - (KRDG)
75°
Clear
as of 9:54 PM EDST
Rel. Humidity: 73%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 29.93 in.
Flight Rule: VFR
Wind Data
3 MPH
170° South
Cloud Level(s): Clear
Cloudy on Tonight Tonight... Partly cloudy, with a low around 64. South wind around 5 mph becoming calm after midnight.
80% chance of thunderstorms Saturday Saturday... Showers and thunderstorms, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. High near 81. Light and variable wind becoming northwest 5 to 10 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.
60% chance of thunderstorms Saturday Night Saturday Night... Showers likely and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Some of the storms could be severe. Cloudy, with a low around 57. Northwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
30% chance of rain Sunday Sunday... A chance of showers before 8am. Cloudy through mid morning, then gradual clearing, with a high near 74. West wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 48. Northwest wind around 5 mph.
Sunny on Monday Monday... Sunny, with a high near 73.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 49.
Sunny on Tuesday Tuesday... Sunny, with a high near 74.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 51.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 73.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 52.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 79.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 50.
Sunny on Friday Friday... Sunny, with a high near 72.
Current Radar Image


Sun Almanac for Williamstown, Pennsylvania
Sunrise: 06:34 AM
Sunset: 7:28 PM
Civil Sunrise:06:06 AM
Civil Sunset: 7:56 PM
Nautical Sunrise: 05:33 AM
Nautical Sunset: 8:29 PM
Astro Sunrise: 04:59 AM
Astro Sunset: 9:03 PM
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