S
M
T
W
T
F
S
26
82°
65°
27
82°
67°
28
82°
63°
29
81°
66°
30
84°
68°
31
82°
61°
1
83°
68°
2
86°
69°
3
83°
62°
4
85°
61°
5
82°
62°
6
82°
61°
7
84°
62°
8
81°
61°
9
81°
67°
10
86°
66°
11
83°
63°
12
86°
66°
13
86°
68°
14
85°
68°
15
82°
67°
16
86°
60°
17
85°
60°
18
80°
61°
19
79°
62°
20
78°
60°
21
79°
59°
22
80°
64°
23
79°
65°
24
83°
66°
25
86°
65°
26
86°
57°
27
82°
57°
28
76°
56°
29
77°
58°
30
77°
62°
31
80°
64°
1
83°
64°
2
83°
62°
3
82°
58°
4
82°
63°
5
81°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Glastonbury
Glastonbury's August 2026 forecast shows daily high temperatures ranging from 76° to 86°, with overnight lows between 56° and 69°. The average high for August is 82° with an average low of 63°. 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.
