Sumas, WA Weather Forecast
Local 7-day forecast
Chance Light Rain
Track current conditions, temperature changes, wind, and the full daily outlook for Sumas, WA in one place.
A chance of rain. Mostly cloudy, with a high near 54.
Local Weather Overview
This forecast page for Sumas, WA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 9, 2026 3:36 PM PDT.
The active forecast window currently covers Apr 13 to Apr 15, 2026 for Sumas, WA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 13 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 3:36 PM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in Sumas
Monday looks like the warmest upcoming period in Sumas at 54 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 38 degrees F.
The strongest winds are forecast for Tuesday at about 6 to 12 mph SSW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 3:36 PM PDT
- Coverage
- 4 days
- Time zone
- America/Los_Angeles
- Forecast office
- SEW
- Radar station
- KATX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of rain. Mostly cloudy, with a low around 45.
Rain. Mostly cloudy, with a high near 52.
Rain. Mostly cloudy, with a low around 42.
Rain likely. Mostly cloudy, with a high near 53.
A chance of rain. Mostly cloudy, with a low around 38.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Apr 13
|
Chance Light Rain
|
54°F |
5 to 10 mph
S
|
|
Monday Night
Apr 13
|
Chance Light Rain
|
45°F |
6 to 9 mph
S
|
|
Tuesday
Apr 14
|
Light Rain
|
52°F |
6 to 12 mph
SSW
|
|
Tuesday Night
Apr 14
|
Rain
|
42°F |
10 mph
SSW
|
|
Wednesday
Apr 15
|
Light Rain Likely
|
53°F |
10 mph
SSW
|
|
Wednesday Night
Apr 15
|
Chance Light Rain
|
38°F |
5 to 9 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sumas.
