S
M
T
W
T
F
S
26
87°
69°
27
81°
63°
28
82°
65°
29
84°
67°
30
83°
63°
31
83°
60°
1
81°
61°
2
81°
59°
3
82°
61°
4
80°
60°
5
80°
61°
6
81°
61°
7
81°
62°
8
82°
66°
9
83°
67°
10
86°
65°
11
86°
61°
12
85°
68°
13
88°
61°
14
83°
59°
15
80°
61°
16
80°
61°
17
81°
62°
18
80°
59°
19
79°
58°
20
79°
59°
21
80°
60°
22
78°
58°
23
78°
59°
24
79°
59°
25
79°
65°
26
80°
67°
27
84°
67°
28
86°
64°
29
86°
57°
30
82°
60°
31
80°
59°
1
77°
64°
2
77°
59°
3
78°
55°
4
77°
60°
5
76°
64°
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 76° to 88°, with overnight lows between 55° and 69°. The average high for August is 81° 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 Romeoville. See also: September | October | November.
