S
M
T
W
T
F
S
26
66°
39°
27
70°
41°
28
59°
45°
29
68°
43°
30
72°
48°
1
64°
46°
2
65°
51°
3
60°
47°
4
62°
46°
5
59°
45°
6
57°
44°
7
59°
41°
8
61°
44°
9
61°
45°
10
62°
45°
11
61°
44°
12
62°
45°
13
61°
47°
14
60°
42°
15
63°
48°
16
62°
48°
17
62°
47°
18
65°
48°
19
62°
48°
20
61°
47°
21
61°
46°
22
62°
46°
23
63°
44°
24
63°
45°
25
62°
44°
26
62°
46°
27
65°
50°
28
64°
51°
29
66°
51°
30
67°
46°
31
62°
45°
1
62°
45°
2
63°
46°
3
62°
45°
4
62°
45°
5
63°
46°
6
63°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Glastonbury
Glastonbury's May 2026 forecast shows daily high temperatures ranging from 57° to 67°, with overnight lows between 41° and 51°. The average high for May is 62° with an average low of 46°. 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 Glastonbury. See also: June | July | August.
