S
M
T
W
T
F
S
26
95°
77°
27
95°
75°
28
96°
74°
29
95°
75°
30
94°
76°
31
95°
75°
1
96°
76°
2
95°
76°
3
94°
75°
4
96°
77°
5
96°
76°
6
95°
75°
7
94°
74°
8
93°
75°
9
94°
76°
10
95°
78°
11
95°
77°
12
96°
77°
13
96°
76°
14
95°
75°
15
95°
75°
16
96°
76°
17
96°
75°
18
95°
76°
19
96°
78°
20
97°
76°
21
96°
77°
22
96°
77°
23
95°
76°
24
96°
77°
25
96°
78°
26
95°
77°
27
95°
77°
28
94°
76°
29
95°
76°
30
95°
75°
31
94°
76°
1
95°
76°
2
95°
75°
3
94°
76°
4
94°
76°
5
92°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Arlington Heights
Arlington Heights's August 2026 forecast shows daily high temperatures ranging from 92° to 97°, with overnight lows between 74° and 78°. The average high for August is 95° with an average low of 76°. 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 Arlington Heights. See also: September | October | November.
