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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Sumas, WA
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August
Average Temperature
High
26°
Feels 26
Low
13°
Feels 13
Average Precipitation
6 Days
Rain amount
29.6mm
Snow amount
0cm
Content continues below
Daily Historical Averages
August 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
23°
27
21°
28
21°
29
20°
30
20°
31
19°
Forecast
Wednesday, August 26, 2026
Day
23°
Feels 23
Wind
11 km/h W
Gust
15 km/h
Humidity
55%
P.O.P
20%
Night
15°
Feels 15
Wind
10 km/h E
Gust
14 km/h
Humidity
88%
P.O.P
30%
Historical Averages
Aug 26
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.