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

74°F

23°C

Humidity 50%
Wind Speed W 6 mph
Barometer 30.02 in (1015.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 21 Jun 4:56 pm EDT
Extended Forecast for

Canonsburg PA

  • Tonight

    Tonight: A chance of showers, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 61. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: Showers and thunderstorms before 2pm, then showers and possibly a thunderstorm, mainly after 2pm. High near 75. Southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 75 °F

    Showers

  • Monday Night

    Monday Night: Showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Low around 58. Northwest wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Showers then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 76. North wind 8 to 10 mph.

    High: 76 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.

    Low: 63 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A chance of showers, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 61. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Showers and thunderstorms before 2pm, then showers and possibly a thunderstorm, mainly after 2pm. High near 75. Southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Low around 58. Northwest wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 76. North wind 8 to 10 mph.
Tuesday Night
Mostly clear, with a low around 53. Northwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Sunday
A chance of showers. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Canonsburg PA
 40.27°N 80.18°W (Elev. 1030 ft)
Last Update:
2:21 pm EDT Jun 21, 2026
Forecast Valid:
5pm EDT Jun 21, 2026-6pm EDT Jun 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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