S
M
T
W
T
F
S
26
62°
41°
27
72°
37°
28
71°
40°
29
68°
45°
30
58°
48°
1
64°
41°
2
56°
47°
3
56°
40°
4
71°
40°
5
78°
52°
6
68°
54°
7
62°
43°
8
61°
41°
9
58°
44°
10
70°
53°
11
62°
52°
12
65°
42°
13
67°
47°
14
61°
54°
15
65°
49°
16
78°
48°
17
90°
53°
18
88°
58°
19
91°
66°
20
91°
67°
21
66°
55°
22
67°
49°
23
58°
49°
24
58°
49°
25
78°
54°
26
82°
59°
27
85°
58°
28
74°
51°
29
71°
51°
30
65°
45°
31
73°
51°
1
70°
50°
2
72°
50°
3
75°
55°
4
76°
58°
5
83°
60°
6
80°
61°
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 65° to 85°, with overnight lows between 45° and 61°. The average high for May is 76° with an average low of 54°. 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.
