Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Abbotsford International Airport (CYXX)

Lat: 49.03333°NLon: 122.36667°WElev: 177.0ft.

Partly Cloudy

63°F

17°C

Humidity 82%
Wind Speed SSW 2 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 57°F (14°C)
Visibility 15.00 mi
Last update 18 Aug 12:00 AM PDT
Extended Forecast for

Sumas WA

  • Overnight

    Overnight: Patchy fog after 2am.  Otherwise, mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 80. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 56. West southwest wind around 6 mph becoming calm  in the evening.

    Low: 56 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 79. Calm wind becoming west around 6 mph in the afternoon.

    High: 79 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56. West wind around 6 mph becoming calm  in the evening.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of rain.  Mostly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 57. Calm wind.
Tuesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 80. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Tuesday Night
Increasing clouds, with a low around 56. West southwest wind around 6 mph becoming calm in the evening.
Wednesday
Partly sunny, with a high near 79. Calm wind becoming west around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 56. West wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 58.
Friday
Mostly sunny, with a high near 82.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 57.
Saturday
A chance of rain. Mostly cloudy, with a high near 72.
Saturday Night
A slight chance of rain. Mostly cloudy, with a low around 55.
Sunday
A slight chance of rain. Partly sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Mostly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Sumas WA
 49°N 122.27°W (Elev. 49 ft)
11:26 pm PDT Aug 17, 2026
12am PDT Aug 18, 2026-6pm PDT Aug 24, 2026
 
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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