S
M
T
W
T
F
S
26
52°
27°
27
51°
36°
28
49°
37°
29
44°
28°
30
47°
21°
1
49°
37°
2
52°
35°
3
45°
35°
4
52°
37°
5
49°
35°
6
50°
36°
7
49°
35°
8
46°
32°
9
55°
33°
10
55°
35°
11
48°
32°
12
56°
33°
13
57°
38°
14
52°
41°
15
50°
36°
16
54°
33°
17
53°
35°
18
55°
35°
19
53°
35°
20
54°
33°
21
55°
33°
22
56°
34°
23
57°
35°
24
58°
36°
25
57°
36°
26
56°
35°
27
57°
35°
28
70°
37°
29
61°
34°
30
58°
35°
31
56°
34°
1
58°
34°
2
59°
35°
3
59°
35°
4
60°
36°
5
58°
36°
6
59°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Glennallen
Glennallen's May 2026 forecast shows daily high temperatures ranging from 50° to 70°, with overnight lows between 33° and 37°. The average high for May is 57° with an average low of 35°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Glennallen. See also: June | July | August.
