S
M
T
W
T
F
S
26
84°
63°
27
80°
61°
28
65°
48°
29
66°
46°
30
69°
45°
1
69°
43°
2
71°
45°
3
85°
49°
4
82°
56°
5
62°
46°
6
61°
40°
7
73°
50°
8
85°
53°
9
88°
57°
10
74°
48°
11
77°
57°
12
88°
66°
13
91°
65°
14
89°
62°
15
89°
63°
16
88°
62°
17
81°
62°
18
80°
58°
19
79°
62°
20
76°
59°
21
82°
55°
22
74°
54°
23
72°
57°
24
74°
57°
25
74°
56°
26
75°
55°
27
77°
59°
28
77°
60°
29
78°
62°
30
78°
66°
31
79°
64°
1
78°
59°
2
79°
63°
3
83°
67°
4
85°
67°
5
80°
66°
6
81°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Glencoe
Glencoe's May 2026 forecast shows daily high temperatures ranging from 61° to 91°, with overnight lows between 40° and 68°. The average high for May is 79° with an average low of 59°. 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 Glencoe. See also: June | July | August.