S
M
T
W
T
F
S
26
85°
67°
27
88°
66°
28
88°
66°
29
81°
64°
30
81°
64°
31
83°
67°
1
86°
70°
2
89°
70°
3
89°
69°
4
88°
68°
5
84°
68°
6
87°
69°
7
89°
68°
8
83°
69°
9
88°
67°
10
80°
63°
11
82°
66°
12
83°
68°
13
85°
67°
14
82°
61°
15
79°
61°
16
80°
63°
17
80°
64°
18
82°
67°
19
85°
64°
20
86°
67°
21
86°
65°
22
79°
61°
23
84°
67°
24
80°
63°
25
86°
60°
26
85°
65°
27
86°
59°
28
79°
57°
29
76°
55°
30
77°
59°
31
78°
62°
1
77°
64°
2
81°
55°
3
77°
53°
4
74°
54°
5
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Streator
Streator's August 2026 forecast shows daily high temperatures ranging from 74° to 89°, with overnight lows between 53° and 70°. The average high for August is 83° with an average low of 64°. 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 Streator. See also: September | October | November.
