National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Pottstown, Pottstown Limerick Airport (KPTW)

Lat: 40.24°NLon: 75.55°WElev: 288ft.

Fog/Mist

66°F

19°C

Humidity 96%
Wind Speed NE 3 mph
Barometer 30.01 in (1015.9 mb)
Dewpoint 65°F (18°C)
Visibility 5.00 mi
Last update 28 Aug 6:54 am EDT
Extended Forecast for

Collegeville PA

  • Today

    Today: A slight chance of showers and thunderstorms between 2pm and 3pm. Areas of fog before 10am. Otherwise, partly sunny, with a high near 83. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.

    High: 83 °F

    Areas Fog
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 58. Calm wind becoming north around 5 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 82. North wind around 5 mph becoming calm.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers after 2pm. Mostly sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers before 2am. Partly cloudy, with a low around 67. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers after 2pm. Partly sunny, with a high near 88. Chance of precipitation is 30%.

    High: 88 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 2pm and 3pm. Areas of fog before 10am. Otherwise, partly sunny, with a high near 83. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 58. Calm wind becoming north around 5 mph.
Saturday
Sunny, with a high near 82. North wind around 5 mph becoming calm.
Saturday Night
Mostly clear, with a low around 59. Calm wind.
Sunday
A slight chance of showers after 2pm. Mostly sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Sunday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 87.
Monday Night
Mostly cloudy, with a low around 68.
Tuesday
A chance of showers after 2pm. Partly sunny, with a high near 88. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
Wednesday
A chance of showers. Partly sunny, with a high near 87. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Collegeville PA
 40.19°N 75.46°W (Elev. 200 ft)
Last Update:
4:09 am EDT Aug 28, 2026
Forecast Valid:
7am EDT Aug 28, 2026-6pm EDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation