S
M
T
W
T
F
S
26
76°
57°
27
76°
58°
28
75°
58°
29
76°
57°
30
75°
57°
31
72°
56°
1
74°
56°
2
70°
57°
3
73°
57°
4
74°
56°
5
74°
57°
6
73°
56°
7
72°
54°
8
71°
52°
9
71°
51°
10
72°
56°
11
70°
53°
12
70°
51°
13
71°
51°
14
70°
56°
15
70°
51°
16
71°
53°
17
70°
51°
18
71°
54°
19
70°
52°
20
69°
51°
21
69°
55°
22
70°
50°
23
69°
50°
24
71°
51°
25
69°
50°
26
68°
49°
27
69°
54°
28
70°
54°
29
72°
55°
30
71°
54°
31
72°
54°
1
72°
53°
2
71°
54°
3
71°
51°
4
72°
53°
5
71°
53°
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 68° to 76°, with overnight lows between 49° and 58°. The average high for August is 72° 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.
