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.

Light Snow

21°F

-6°C

Humidity 74%
Wind Speed W 8 mph
Barometer 29.98 in (1016.8 mb)
Dewpoint 14°F (-10°C)
Visibility 9.00 mi
Wind Chill11°F (-12°C)
Last update 18 Jan 1:56 pm EST
Extended Forecast for

Canonsburg PA

Cold Weather Advisory January 19, 09:00pm until January 20, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • This Afternoon

    This Afternoon: A slight chance of snow before 4pm. Mostly cloudy, with a high near 24. West wind around 8 mph. Chance of precipitation is 20%.

    High: 24 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: Snow likely, mainly after 3am. Mostly cloudy, with a low around 16. Light southwest wind increasing to 5 to 9 mph after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 16 °F

    Mostly Cloudy
    then Snow
    Likely

  • M.L.King Day

    M.L.King Day: A chance of snow before 7am, then a chance of snow showers between 7am and 3pm. Mostly cloudy, with a high near 26. Breezy, with a west wind 14 to 24 mph, with gusts as high as 37 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    High: 26 °F

    Chance Snow
    and Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 5. Wind chill values as low as -8. West wind 9 to 17 mph, with gusts as high as 29 mph.

    Low: 5 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 18. West wind 10 to 14 mph, with gusts as high as 28 mph.

    High: 18 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 9.

    Low: 9 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of rain and snow showers after 1pm. Mostly cloudy, with a high near 39. Chance of precipitation is 40%.

    High: 39 °F

    Partly Sunny
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A chance of rain and snow showers before 1am, then snow showers likely. Mostly cloudy, with a low around 24. Chance of precipitation is 60%.

    Low: 24 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: A chance of snow showers before 1pm. Partly sunny, with a high near 30. Chance of precipitation is 40%.

    High: 30 °F

    Chance Snow
    Showers

Detailed Forecast

This Afternoon
A slight chance of snow before 4pm. Mostly cloudy, with a high near 24. West wind around 8 mph. Chance of precipitation is 20%.
Tonight
Snow likely, mainly after 3am. Mostly cloudy, with a low around 16. Light southwest wind increasing to 5 to 9 mph after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
M.L.King Day
A chance of snow before 7am, then a chance of snow showers between 7am and 3pm. Mostly cloudy, with a high near 26. Breezy, with a west wind 14 to 24 mph, with gusts as high as 37 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Monday Night
Partly cloudy, with a low around 5. Wind chill values as low as -8. West wind 9 to 17 mph, with gusts as high as 29 mph.
Tuesday
Mostly sunny, with a high near 18. West wind 10 to 14 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 9.
Wednesday
A chance of rain and snow showers after 1pm. Mostly cloudy, with a high near 39. Chance of precipitation is 40%.
Wednesday Night
A chance of rain and snow showers before 1am, then snow showers likely. Mostly cloudy, with a low around 24. Chance of precipitation is 60%.
Thursday
A chance of snow showers before 1pm. Partly sunny, with a high near 30. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 11.
Friday
Mostly cloudy, with a high near 28.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 15. Chance of precipitation is 30%.
Saturday
A chance of snow showers. Mostly cloudy, with a high near 24. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Canonsburg PA
 40.25°N 80.18°W (Elev. 997 ft)
Last Update:
1:29 pm EST Jan 18, 2026
Forecast Valid:
2pm EST Jan 18, 2026-6pm EST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation