S
M
T
W
T
F
S
26
85°
69°
27
84°
61°
28
84°
62°
29
85°
67°
30
88°
64°
31
87°
63°
1
88°
64°
2
85°
62°
3
84°
62°
4
84°
61°
5
85°
61°
6
84°
62°
7
85°
62°
8
85°
64°
9
88°
68°
10
86°
63°
11
85°
64°
12
90°
69°
13
91°
62°
14
90°
61°
15
84°
60°
16
84°
60°
17
85°
63°
18
89°
61°
19
83°
60°
20
81°
58°
21
82°
60°
22
82°
59°
23
81°
59°
24
81°
60°
25
82°
65°
26
81°
66°
27
88°
66°
28
88°
65°
29
89°
57°
30
85°
57°
31
80°
60°
1
82°
62°
2
80°
60°
3
80°
60°
4
79°
64°
5
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Roselle
Roselle's August 2026 forecast shows daily high temperatures ranging from 79° to 91°, with overnight lows between 57° and 69°. The average high for August is 85° 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 Roselle. See also: September | October | November.
