S
M
T
W
T
F
S
26
91°
71°
27
85°
69°
28
76°
63°
29
78°
57°
30
85°
56°
31
77°
63°
1
68°
65°
2
74°
60°
3
78°
59°
4
82°
65°
5
79°
66°
6
75°
63°
7
79°
64°
8
82°
66°
9
83°
64°
10
82°
66°
11
79°
63°
12
79°
65°
13
77°
65°
14
80°
62°
15
75°
58°
16
75°
65°
17
84°
67°
18
84°
68°
19
85°
66°
20
80°
66°
21
83°
65°
22
83°
66°
23
82°
66°
24
81°
65°
25
80°
65°
26
82°
64°
27
79°
62°
28
76°
64°
29
80°
63°
30
81°
64°
31
81°
64°
1
82°
63°
2
77°
63°
3
79°
62°
4
79°
63°
5
81°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Waukegan
Waukegan's August 2026 forecast shows daily high temperatures ranging from 68° to 85°, with overnight lows between 58° and 68°. The average high for August is 80° with an average low of 64°. 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 Waukegan. See also: September | October | November.
