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

Philadelphia, Philadelphia International Airport (KPHL)

Lat: 39.87°NLon: 75.23°WElev: 7ft.

Mostly Cloudy

77°F

25°C

Humidity 77%
Wind Speed N 12 G 21 mph
Barometer 30.08 in (1018.5 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 18 Sep 8:54 am EDT
Extended Forecast for

Conshohocken PASimilar City Names

  • Today

    Today: Partly sunny, with a high near 84. North wind 5 to 10 mph.

    High: 84 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. North wind around 5 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 77. East wind 5 to 10 mph.

    High: 77 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 61. East wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 2pm. High near 75. South wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 75 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 63. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 63 °F

    Showers

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 71. Chance of precipitation is 40%.

    High: 71 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Mostly cloudy, with a low around 57. Chance of precipitation is 50%.

    Low: 57 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 50%.

    High: 65 °F

    Chance
    Showers

Detailed Forecast

Today
Partly sunny, with a high near 84. North wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 58. North wind around 5 mph.
Saturday
Partly sunny, with a high near 77. East wind 5 to 10 mph.
Saturday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 61. East wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday
Showers, mainly after 2pm. High near 75. South wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 63. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Monday
A chance of showers. Mostly cloudy, with a high near 71. Chance of precipitation is 40%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 57. Chance of precipitation is 50%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 50%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly cloudy, with a high near 67. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Conshohocken PASimilar City Names
 40.09°N 75.31°W (Elev. 118 ft)
Last Update:
4:09 am EDT Sep 18, 2026
Forecast Valid:
9am EDT Sep 18, 2026-6pm EDT Sep 24, 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