S
M
T
W
T
F
S
26
81°
50°
27
80°
49°
28
77°
50°
29
74°
50°
30
72°
54°
31
72°
50°
1
73°
50°
2
74°
49°
3
73°
52°
4
74°
56°
5
80°
55°
6
80°
52°
7
79°
55°
8
80°
51°
9
71°
54°
10
73°
49°
11
75°
49°
12
76°
52°
13
74°
55°
14
79°
51°
15
81°
49°
16
81°
49°
17
80°
52°
18
80°
56°
19
71°
58°
20
71°
48°
21
72°
50°
22
71°
49°
23
72°
50°
24
76°
48°
25
79°
49°
26
78°
56°
27
73°
48°
28
68°
48°
29
68°
45°
30
72°
50°
31
73°
51°
1
69°
50°
2
68°
48°
3
69°
47°
4
68°
44°
5
67°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Upper Samish River
Upper Samish River's August 2026 forecast shows daily high temperatures ranging from 67° to 81°, with overnight lows between 44° and 58°. The average high for August is 74° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Upper Samish River. See also: September | October | November.
