S
M
T
W
T
F
S
26
81°
59°
27
79°
57°
28
63°
57°
29
81°
63°
30
72°
57°
1
64°
54°
2
70°
45°
3
70°
37°
4
79°
39°
5
79°
43°
6
81°
61°
7
75°
61°
8
70°
54°
9
70°
55°
10
81°
59°
11
81°
57°
12
70°
61°
13
79°
55°
14
77°
50°
15
79°
43°
16
84°
50°
17
90°
61°
18
88°
61°
19
88°
61°
20
86°
63°
21
86°
66°
22
86°
64°
23
86°
68°
24
82°
68°
25
81°
70°
26
83°
70°
27
84°
69°
28
82°
67°
29
85°
70°
30
84°
69°
31
79°
68°
1
86°
66°
2
N/A
3
81°
54°
4
83°
58°
5
85°
63°
6
84°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Glenn
Glenn's May 2026 forecast shows daily high temperatures ranging from 81° to 85°, with overnight lows between 54° and 67°. The average high for May is 83° with an average low of 61°. 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 Glenn. See also: June | July | August.
