S
M
T
W
T
F
S
26
87°
65°
27
81°
62°
28
81°
60°
29
82°
61°
30
86°
66°
31
88°
65°
1
85°
62°
2
86°
64°
3
89°
58°
4
82°
58°
5
82°
61°
6
83°
58°
7
82°
57°
8
83°
56°
9
82°
56°
10
82°
64°
11
84°
61°
12
84°
61°
13
88°
56°
14
81°
56°
15
84°
58°
16
82°
57°
17
79°
57°
18
80°
56°
19
81°
56°
20
82°
58°
21
84°
62°
22
85°
63°
23
87°
64°
24
88°
64°
25
89°
60°
26
87°
57°
27
84°
61°
28
86°
62°
29
83°
55°
30
84°
53°
31
80°
52°
1
78°
55°
2
77°
53°
3
79°
54°
4
78°
52°
5
76°
52°
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 76° to 89°, with overnight lows between 52° and 66°. The average high for August is 83° with an average low of 59°. 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.
