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

Hazardous Weather Conditions

Current conditions at

Washington County Airport (KAFJ)

Lat: 40.14°NLon: 80.29°WElev: 1184ft.

Partly Cloudy

76°F

24°C

Humidity 69%
Wind Speed SW 8 mph
Barometer 30.19 in (1021.3 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 May 8:56 am EDT
Extended Forecast for

Canonsburg PA

  • Today

    Today: Mostly sunny, with a high near 88. Southwest wind 10 to 15 mph.

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 67. Southwest wind 6 to 8 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Partly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. High near 74. Southwest wind 8 to 11 mph becoming north in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 48. North wind 7 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Thursday

    Thursday: A chance of showers after 2pm. Partly sunny, with a high near 67. Northeast wind 8 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 67 °F

    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 8pm, then a slight chance of showers after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Chance
    Showers

  • Friday

    Friday: Showers, mainly after 8am. High near 66. Chance of precipitation is 90%.

    High: 66 °F

    Showers
    Likely then
    Showers

  • Friday Night

    Friday Night: Showers. Low around 56. Chance of precipitation is 100%.

    Low: 56 °F

    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 2pm. High near 72. Chance of precipitation is 90%.

    High: 72 °F

    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 88. Southwest wind 10 to 15 mph.
Tonight
A chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 67. Southwest wind 6 to 8 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. High near 74. Southwest wind 8 to 11 mph becoming north in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 48. North wind 7 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A chance of showers after 2pm. Partly sunny, with a high near 67. Northeast wind 8 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A chance of showers before 8pm, then a slight chance of showers after 2am. Mostly cloudy, with a low around 54. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers, mainly after 8am. High near 66. Chance of precipitation is 90%.
Friday Night
Showers. Low around 56. Chance of precipitation is 100%.
Saturday
Showers, with thunderstorms also possible after 2pm. High near 72. Chance of precipitation is 90%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Memorial Day
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Canonsburg PA
 40.25°N 80.16°W (Elev. 1106 ft)
Last Update:
7:01 am EDT May 19, 2026
Forecast Valid:
9am EDT May 19, 2026-6pm EDT May 25, 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