S
M
T
W
T
F
S
26
85°
69°
27
84°
61°
28
84°
62°
29
85°
67°
30
88°
64°
31
87°
68°
1
90°
64°
2
86°
63°
3
85°
62°
4
83°
61°
5
84°
62°
6
83°
62°
7
84°
61°
8
84°
62°
9
85°
67°
10
86°
65°
11
84°
67°
12
88°
67°
13
89°
68°
14
90°
64°
15
90°
61°
16
84°
62°
17
83°
66°
18
88°
62°
19
88°
60°
20
82°
59°
21
82°
59°
22
84°
61°
23
83°
60°
24
87°
65°
25
88°
64°
26
88°
62°
27
85°
61°
28
81°
58°
29
81°
64°
30
84°
63°
31
86°
64°
1
86°
63°
2
85°
63°
3
82°
62°
4
84°
60°
5
79°
60°
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 90°, with overnight lows between 58° and 69°. The average high for August is 85° with an average low of 63°. 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.
