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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Quakertown Airport (KUKT)

Lat: 40.44°NLon: 75.38°WElev: 509ft.

Light Rain

64°F

18°C

Humidity 100%
Wind Speed SE 7 mph
Barometer 30.00 in
Dewpoint 64°F (18°C)
Visibility 6.00 mi
Last update 20 Sep 10:35 am EDT
Extended Forecast for

Coopersburg PA

  • Today

    Today: Rain, with thunderstorms also possible after 2pm. High near 72. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 72 °F

    Rain

  • Tonight

    Tonight: Rain and possibly a thunderstorm before 8pm, then a chance of rain between 8pm and 11pm. Some of the storms could produce heavy rainfall. Low around 57. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Heavy Rain
    then Partly
    Cloudy

  • Monday

    Monday: A slight chance of showers between 2pm and 3pm. Partly sunny, with a high near 69. North wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 69 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 50. Northeast wind 5 to 10 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Cloudy, with a high near 62. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 48. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 30%.

    High: 63 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 48. Chance of precipitation is 30%.

    Low: 48 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.

    High: 62 °F

    Chance
    Showers

Detailed Forecast

Today
Rain, with thunderstorms also possible after 2pm. High near 72. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Rain and possibly a thunderstorm before 8pm, then a chance of rain between 8pm and 11pm. Some of the storms could produce heavy rainfall. Low around 57. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A slight chance of showers between 2pm and 3pm. Partly sunny, with a high near 69. North wind 5 to 10 mph. Chance of precipitation is 20%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 50. Northeast wind 5 to 10 mph. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers. Cloudy, with a high near 62. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 48. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A chance of showers before 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 30%.
Wednesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 48. Chance of precipitation is 30%.
Thursday
A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 48. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Friday Night
A chance of showers. Partly cloudy, with a low around 48. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Coopersburg PA
 40.52°N 75.4°W (Elev. 499 ft)
Last Update:
4:09 am EDT Sep 20, 2026
Forecast Valid:
10am EDT Sep 20, 2026-6pm EDT Sep 26, 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