S
M
T
W
T
F
S
26
86°
68°
27
87°
69°
28
89°
68°
29
86°
67°
30
87°
65°
31
79°
65°
1
81°
67°
2
87°
69°
3
89°
68°
4
89°
68°
5
88°
67°
6
86°
66°
7
86°
66°
8
84°
61°
9
85°
58°
10
79°
59°
11
80°
60°
12
79°
58°
13
80°
59°
14
80°
58°
15
79°
65°
16
81°
63°
17
84°
62°
18
80°
59°
19
81°
59°
20
84°
60°
21
85°
61°
22
85°
65°
23
86°
66°
24
86°
66°
25
88°
67°
26
87°
65°
27
87°
57°
28
83°
57°
29
79°
58°
30
80°
57°
31
79°
56°
1
78°
57°
2
77°
56°
3
78°
55°
4
80°
58°
5
80°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in West Allis
West Allis's August 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 55° and 69°. The average high for August is 83° with an average low of 62°. 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 West Allis. See also: September | October | November.
