S
M
T
W
T
F
S
26
76°
59°
27
86°
61°
28
87°
57°
29
86°
54°
30
81°
49°
31
78°
51°
1
79°
50°
2
78°
50°
3
79°
52°
4
81°
57°
5
86°
59°
6
86°
59°
7
88°
55°
8
84°
55°
9
83°
54°
10
86°
56°
11
80°
55°
12
87°
46°
13
77°
54°
14
79°
57°
15
86°
50°
16
85°
51°
17
80°
50°
18
81°
50°
19
84°
49°
20
78°
47°
21
77°
51°
22
80°
55°
23
83°
46°
24
77°
44°
25
74°
44°
26
72°
45°
27
72°
44°
28
73°
44°
29
73°
42°
30
74°
45°
31
73°
45°
1
71°
43°
2
71°
49°
3
73°
51°
4
76°
44°
5
75°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Westby
Westby's August 2026 forecast shows daily high temperatures ranging from 71° to 88°, with overnight lows between 40° and 61°. The average high for August is 79° with an average low of 50°. 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 Westby. See also: September | October | November.