S
M
T
W
T
F
S
26
93°
73°
27
94°
74°
28
95°
74°
29
95°
73°
30
94°
73°
31
93°
72°
1
93°
73°
2
94°
73°
3
95°
72°
4
95°
73°
5
94°
72°
6
93°
73°
7
90°
65°
8
91°
68°
9
92°
63°
10
87°
65°
11
86°
63°
12
87°
66°
13
86°
68°
14
85°
65°
15
86°
69°
16
91°
68°
17
87°
65°
18
87°
64°
19
85°
63°
20
84°
62°
21
85°
61°
22
85°
63°
23
90°
67°
24
91°
67°
25
92°
66°
26
92°
67°
27
91°
60°
28
90°
61°
29
85°
62°
30
84°
61°
31
83°
59°
1
84°
58°
2
82°
58°
3
81°
57°
4
81°
57°
5
82°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fairview Heights
Fairview Heights's August 2026 forecast shows daily high temperatures ranging from 81° to 95°, with overnight lows between 57° and 74°. The average high for August is 89° with an average low of 66°. 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 Fairview Heights. See also: September | October | November.
