S
M
T
W
T
F
S
26
83°
52°
27
88°
49°
28
89°
49°
29
89°
47°
30
87°
48°
31
90°
50°
1
86°
49°
2
82°
47°
3
83°
46°
4
82°
47°
5
83°
48°
6
82°
48°
7
82°
45°
8
83°
44°
9
82°
48°
10
87°
50°
11
86°
50°
12
85°
44°
13
81°
45°
14
81°
45°
15
78°
41°
16
78°
41°
17
80°
43°
18
83°
45°
19
86°
46°
20
87°
48°
21
87°
49°
22
85°
48°
23
86°
47°
24
82°
48°
25
79°
47°
26
81°
47°
27
82°
45°
28
78°
39°
29
77°
39°
30
77°
37°
31
78°
38°
1
78°
38°
2
81°
43°
3
81°
40°
4
83°
43°
5
84°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Swan Valley
Swan Valley's August 2026 forecast shows daily high temperatures ranging from 77° to 90°, with overnight lows between 37° and 52°. The average high for August is 83° with an average low of 45°. 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 Valley. See also: September | October | November.
