Weather World
City of Sumas, WASumas, WA 7-Day Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Sumas Weather Forecast
Sumas, WA Weather Forecast Date: 236 PM PDT Tue Sep 15 2026
Weather forecast for Sumas, WA
Tonight Lo: 50°F Lo: 10°C |
Tonight... Mostly clear. Patchy fog late in the night. Lows in the upper 40s to mid 50s. West wind to 10 mph in the evening becoming light. |
| Wed Hi: 70°FHi: 21°C Lo: 50°F Lo: 10°C |
Wednesday... Sunny. Patchy fog in the morning. Highs in the upper 60s to mid 70s. Light wind becoming northwest to 10 mph in the afternoon. |
Thu Hi: 75°FHi: 24°C Lo: 53°F Lo: 12°C |
Thursday... Sunny. Highs in the 70s. Light wind becoming west to 10 mph in the afternoon. |
| Fri Hi: 70°FHi: 21°C Lo: 51°F Lo: 11°C |
Friday... Sunny. Highs in the upper 60s to mid 70s. |
| Sat Hi: 70°FHi: 21°C Lo: 51°F Lo: 11°C |
Saturday... Mostly sunny. Highs in the upper 60s to mid 70s. |
| Sun Hi: 73°FHi: 23°C Lo: 51°F Lo: 11°C |
Sunday... Mostly sunny. Highs in the lower to mid 70s. |
Mon Hi: 70°FHi: 21°C Lo: 51°F Lo: 11°C |
Monday... Partly sunny. Highs near 70. |
Sumas Radar Loop
Use the map search tool if you want to place a location marker on the radar map...