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