10-day forecast for Sumas, WA: 38° to 60°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
60°
Best day: Friday, November 6
54° · 1.22 in
Worst day: Saturday, November 7
Tap any day below to see morning, afternoon, evening and overnight.
Fri, 3050° / 40°0.13
Morning43°feels 41°
Afternoon47°feels 47°
Evening42°feels 40°
Overnight42°feels 38°
50 °
Sumas, Friday, 30 October
Light rain. High 50°, low 40°.
Pressure29.94 inHg
Wind3 mph SE
Humidity72%
Visibility4.3 mi
Dew point39°
Sat, 3155° / 38°0
Morning38°feels 34°
Afternoon54°feels 53°
Evening45°feels 45°
Overnight39°feels 36°
55 °
Sumas, Saturday, 31 October
Partly cloudy. High 55°, low 38°.
Pressure30.03 inHg
Wind5.5 mph NE
Humidity83%
Visibility—
Dew point43°
Sun, 0153° / 38°0
Morning38°feels 38°
Afternoon53°feels 51°
Evening44°feels 44°
Overnight39°feels 39°
53 °
Sumas, Sunday, 1 November
Overcast. High 53°, low 38°.
Pressure30.21 inHg
Wind0.5 mph SE
Humidity80%
Visibility—
Dew point41°
Mon, 0257° / 39°0
Morning43°feels 40°
Afternoon51°feels 49°
Evening52°feels 51°
Overnight45°feels 44°
57 °
Sumas, Monday, 2 November
Overcast. High 57°, low 39°.
Pressure30.27 inHg
Wind4.3 mph NE
Humidity69%
Visibility—
Dew point39°
Tue, 0358° / 46°0
Morning47°feels 47°
Afternoon52°feels 50°
Evening51°feels 50°
Overnight46°feels 46°
58 °
Sumas, Tuesday, 3 November
Overcast. High 58°, low 46°.
Pressure30.27 inHg
Wind2.5 mph NE
Humidity71%
Visibility—
Dew point42°
Wed, 0456° / 42°0
Morning46°feels 44°
Afternoon51°feels 49°
Evening50°feels 48°
Overnight45°feels 45°
56 °
Sumas, Wednesday, 4 November
Overcast. High 56°, low 42°.
Pressure29.88 inHg
Wind3.4 mph NE
Humidity56%
Visibility—
Dew point35°
Thu, 0553° / 45°0
Morning47°feels 47°
Afternoon51°feels 49°
Evening51°feels 49°
Overnight49°feels 49°
53 °
Sumas, Thursday, 5 November
Overcast. High 53°, low 45°.
Pressure30.06 inHg
Wind2.3 mph NE
Humidity65%
Visibility—
Dew point39°
Fri, 0660° / 44°0
Morning48°feels 47°
Afternoon55°feels 53°
Evening55°feels 54°
Overnight51°feels 49°
60 °
Sumas, Friday, 6 November
Mostly clear. High 60°, low 44°.
Pressure30.00 inHg
Wind4.4 mph NE
Humidity65%
Visibility—
Dew point42°
Sat, 0754° / 46°1.22
Morning50°feels 49°
Afternoon51°feels 51°
Evening50°feels 49°
Overnight48°feels 47°
54 °
Sumas, Saturday, 7 November
Rain. High 54°, low 46°.
Pressure29.71 inHg
Wind10.1 mph SW
Humidity91%
Visibility—
Dew point49°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Sumas, WA around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.