S
M
T
W
T
F
S
30
72°
57°
31
72°
54°
1
72°
52°
2
68°
59°
3
79°
66°
4
68°
55°
5
70°
52°
6
81°
55°
7
70°
59°
8
64°
55°
9
66°
50°
10
66°
46°
11
N/A
12
71°
63°
13
70°
62°
14
74°
59°
15
67°
51°
16
64°
54°
17
66°
50°
18
65°
54°
19
66°
51°
20
68°
53°
21
66°
51°
22
66°
50°
23
64°
49°
24
65°
50°
25
63°
50°
26
64°
51°
27
63°
50°
28
65°
50°
29
62°
49°
30
62°
49°
1
63°
48°
2
64°
49°
3
64°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Glastonbury
Glastonbury's September 2026 forecast shows daily high temperatures ranging from 62° to 74°, with overnight lows between 48° and 63°. The average high for September is 66° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Glastonbury. See also: October | November | December.
