S
M
T
W
T
F
S
26
89°
68°
27
84°
69°
28
82°
66°
29
80°
63°
30
85°
60°
31
77°
67°
1
72°
67°
2
79°
62°
3
82°
61°
4
82°
64°
5
83°
67°
6
82°
67°
7
83°
67°
8
84°
66°
9
83°
67°
10
83°
67°
11
85°
63°
12
81°
65°
13
80°
63°
14
88°
67°
15
78°
60°
16
78°
67°
17
87°
69°
18
87°
68°
19
88°
68°
20
83°
67°
21
85°
67°
22
86°
68°
23
86°
68°
24
83°
67°
25
83°
67°
26
85°
66°
27
82°
64°
28
79°
66°
29
82°
66°
30
83°
65°
31
84°
65°
1
83°
66°
2
80°
65°
3
81°
64°
4
81°
64°
5
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Romeoville
Romeoville's August 2026 forecast shows daily high temperatures ranging from 72° to 88°, with overnight lows between 60° and 69°. The average high for August is 83° with an average low of 66°. 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 Romeoville. See also: September | October | November.
