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

Hot Temperatures in the Northwest U.S.; Tropical Rainfall Potential in the Southwest U.S.

Hot to extremely hot temperatures are in place again Thursday across the interior northwest U.S. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring a marginal to slight risk of excessive rainfall across the southwest U.S. through Saturday which may bring areas of flooding. Read More >

Current conditions at

Quakertown Airport (KUKT)

Lat: 40.44°NLon: 75.38°WElev: 509ft.

Fair

57°F

14°C

Humidity 100%
Wind Speed Calm
Barometer 29.89 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 4 Sep 7:15 am EDT
Extended Forecast for

Coopersburg PA

  • Today

    Today: Mostly sunny, with a high near 81. South wind 5 to 15 mph.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 1am. Mostly cloudy, with a low around 61. South wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 83. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 83 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65. South wind around 5 mph.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. South wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Mostly Sunny
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Cloudy, with a low around 56. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 8am. Partly sunny, with a high near 71. Chance of precipitation is 30%.

    High: 71 °F

    Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 81. South wind 5 to 15 mph.
Tonight
Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 1am. Mostly cloudy, with a low around 61. South wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Mostly sunny, with a high near 83. Light southwest wind increasing to 5 to 10 mph in the morning.
Friday Night
Mostly clear, with a low around 65. South wind around 5 mph.
Saturday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. South wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Cloudy, with a low around 56. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A chance of showers before 8am. Partly sunny, with a high near 71. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 50.
Monday
Sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Mostly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Coopersburg PA
 40.49°N 75.37°W (Elev. 600 ft)
Last Update:
4:09 am EDT Sep 4, 2025
Forecast Valid:
7am EDT Sep 4, 2025-6pm EDT Sep 10, 2025
 
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