S
M
T
W
T
F
S
26
72°
48°
27
68°
42°
28
66°
41°
29
72°
39°
30
74°
49°
31
77°
38°
1
79°
51°
2
78°
50°
3
65°
52°
4
70°
54°
5
74°
42°
6
76°
47°
7
74°
42°
8
74°
39°
9
77°
41°
10
76°
40°
11
77°
40°
12
76°
53°
13
80°
44°
14
81°
48°
15
78°
49°
16
68°
54°
17
66°
54°
18
63°
50°
19
68°
47°
20
62°
47°
21
62°
46°
22
63°
43°
23
67°
29°
24
69°
31°
25
63°
48°
26
63°
34°
27
63°
47°
28
55°
44°
29
57°
37°
30
58°
39°
31
56°
38°
1
56°
33°
2
52°
36°
3
57°
39°
4
61°
44°
5
62°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Glennallen
Glennallen's August 2026 forecast shows daily high temperatures ranging from 52° to 63°, with overnight lows between 33° and 47°. The average high for August is 58° with an average low of 39°. 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 Glennallen. See also: September | October | November.