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