S
M
T
W
T
F
S
26
72°
52°
27
81°
50°
28
83°
51°
29
80°
45°
30
82°
44°
31
73°
43°
1
74°
44°
2
77°
45°
3
80°
48°
4
80°
52°
5
81°
54°
6
82°
54°
7
83°
51°
8
79°
52°
9
79°
46°
10
74°
45°
11
73°
50°
12
75°
43°
13
71°
45°
14
73°
51°
15
81°
46°
16
78°
44°
17
75°
51°
18
77°
47°
19
79°
43°
20
73°
42°
21
75°
51°
22
77°
46°
23
78°
39°
24
70°
40°
25
69°
41°
26
68°
41°
27
68°
42°
28
69°
41°
29
66°
39°
30
65°
38°
31
66°
39°
1
65°
41°
2
64°
43°
3
67°
47°
4
73°
47°
5
72°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Swan River
Swan River's August 2026 forecast shows daily high temperatures ranging from 64° to 83°, with overnight lows between 38° and 54°. The average high for August is 74° with an average low of 46°. 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 Swan River. See also: September | October | November.