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 >

Hazardous Weather Conditions

Current conditions at

Pittsburgh International Airport (KPIT)

Lat: 40.48°NLon: 80.21°WElev: 1203ft.

Overcast

70°F

21°C

Humidity 93%
Wind Speed N 8 mph
Barometer 29.94 in (1014.0 mb)
Dewpoint 68°F (20°C)
Visibility 7.00 mi
Last update 20 Sep 3:51 pm EDT
Extended Forecast for

Aliquippa PA

Flood Watch until September 21, 12:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until September 21, 12:00pm

    NOW until 12:00pm Mon

    Flood Watch

  • This Afternoon

    High: 74 °F

    Chance
    Showers

  • Tonight

    Tonight: Showers likely, mainly after 5am. Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 57. North wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Showers
    Likely and
    Patchy Fog

  • Monday

    Monday: Showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Patchy fog between 8am and 9am. High near 65. East wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 65 °F

    Showers and
    Patchy Fog

  • Monday Night

    Monday Night: Showers. Low around 56. Northeast wind 8 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 56 °F

    Showers

  • Tuesday

    Tuesday: Showers likely. Cloudy, with a high near 65. East wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 65 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely. Cloudy, with a low around 54. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.

    High: 63 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.

    Low: 51 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms. Mostly cloudy, with a high near 74. Northwest wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers likely, mainly after 5am. Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 57. North wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Patchy fog between 8am and 9am. High near 65. East wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Showers. Low around 56. Northeast wind 8 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Showers likely. Cloudy, with a high near 65. East wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Showers likely. Cloudy, with a low around 54. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.
Thursday
A chance of showers before 2pm. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 68.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 71.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Aliquippa PA
 40.61°N 80.25°W (Elev. 899 ft)
Last Update:
2:22 pm EDT Sep 20, 2026
Forecast Valid:
4pm EDT Sep 20, 2026-6pm EDT Sep 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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