S
M
T
W
T
F
S
26
73°
61°
27
75°
57°
28
81°
61°
29
82°
57°
30
73°
57°
31
73°
48°
1
72°
48°
2
82°
46°
3
86°
50°
4
79°
64°
5
N/A
6
70°
49°
7
71°
50°
8
80°
56°
9
81°
57°
10
78°
56°
11
87°
62°
12
84°
62°
13
79°
58°
14
77°
58°
15
76°
57°
16
74°
55°
17
74°
56°
18
75°
55°
19
68°
52°
20
67°
51°
21
67°
50°
22
68°
51°
23
68°
52°
24
70°
55°
25
72°
55°
26
71°
54°
27
70°
52°
28
71°
55°
29
71°
55°
30
72°
54°
31
72°
55°
1
69°
54°
2
68°
52°
3
68°
49°
4
67°
50°
5
68°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Glastonbury
Glastonbury's August 2026 forecast shows daily high temperatures ranging from 67° to 87°, with overnight lows between 49° and 62°. The average high for August is 73° 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 August weather will actually feel in Glastonbury. See also: September | October | November.
