Sumas, WA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sumas, WA in one place.
Sunny, with a high near 84.
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: Jul 12, 2026 1:46 AM PDT.
The active forecast window currently covers Jul 14 to Jul 18, 2026 for Sumas, WA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 18, 2026
- Latest sync
- Jul 12, 2026 1:46 AM PDT
- Forecast office
- SEW
- Source
- NOAA / NWS
Daily Outlook
This Week in Sumas
Saturday looks like the warmest upcoming period in Sumas at 85 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Thursday at about 3 to 8 mph SSW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 12, 2026 1:46 AM PDT
- Coverage
- 5 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
Mostly clear, with a low around 58.
A slight chance of rain after 5pm. Sunny, with a high near 84.
A chance of rain. Mostly cloudy, with a low around 58.
A chance of rain. Partly sunny, with a high near 79.
A chance of rain before 11pm. Partly cloudy, with a low around 58.
Sunny, with a high near 82.
Mostly clear, with a low around 58.
Sunny, with a high near 85.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
84°F |
0 to 7 mph
S
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
58°F |
0 to 7 mph
S
|
|
Wednesday
Jul 15
|
Sunny then Slight Chance Light Rain
|
84°F |
0 to 7 mph
SW
|
|
Wednesday Night
Jul 15
|
Chance Light Rain
|
58°F |
3 to 7 mph
SSW
|
|
Thursday
Jul 16
|
Chance Light Rain
|
79°F |
3 to 8 mph
SSW
|
|
Thursday Night
Jul 16
|
Chance Light Rain then Partly Cloudy
|
58°F |
1 to 8 mph
SSE
|
|
Friday
Jul 17
|
Sunny
|
82°F |
1 to 7 mph
SW
|
|
Friday Night
Jul 17
|
Mostly Clear
|
58°F |
0 to 7 mph
SSW
|
|
Saturday
Jul 18
|
Sunny
|
85°F |
0 to 7 mph
WSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sumas.
