S
M
T
W
T
F
S
26
92°
74°
27
91°
75°
28
93°
75°
29
93°
74°
30
92°
74°
31
91°
73°
1
88°
73°
2
90°
71°
3
89°
73°
4
92°
74°
5
93°
75°
6
93°
74°
7
88°
73°
8
92°
72°
9
92°
72°
10
91°
66°
11
86°
67°
12
87°
66°
13
86°
66°
14
90°
67°
15
86°
68°
16
85°
71°
17
86°
71°
18
89°
69°
19
86°
69°
20
85°
68°
21
85°
70°
22
86°
70°
23
85°
67°
24
88°
69°
25
90°
65°
26
90°
63°
27
84°
64°
28
84°
65°
29
85°
67°
30
83°
68°
31
86°
69°
1
88°
64°
2
83°
63°
3
83°
63°
4
84°
62°
5
82°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fairmount Heights
Fairmount Heights's August 2026 forecast shows daily high temperatures ranging from 82° to 93°, with overnight lows between 62° and 75°. The average high for August is 88° with an average low of 69°. 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 Fairmount Heights. See also: September | October | November.