S
M
T
W
T
F
S
26
65°
41°
27
73°
36°
28
68°
39°
29
67°
48°
30
60°
46°
1
65°
35°
2
58°
43°
3
60°
34°
4
73°
36°
5
85°
47°
6
70°
52°
7
60°
41°
8
59°
39°
9
55°
45°
10
71°
48°
11
60°
39°
12
60°
39°
13
58°
43°
14
63°
44°
15
64°
50°
16
71°
49°
17
69°
49°
18
68°
48°
19
69°
50°
20
70°
46°
21
67°
42°
22
67°
43°
23
68°
43°
24
69°
45°
25
72°
49°
26
76°
50°
27
71°
49°
28
72°
45°
29
70°
44°
30
74°
50°
31
79°
53°
1
78°
53°
2
76°
50°
3
76°
51°
4
80°
54°
5
80°
55°
6
81°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Glasco
Glasco's May 2026 forecast shows daily high temperatures ranging from 55° to 81°, with overnight lows between 39° and 55°. The average high for May is 69° with an average low of 47°. 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 Glasco. See also: June | July | August.