S
M
T
W
T
F
S
26
87°
67°
27
87°
67°
28
88°
66°
29
88°
65°
30
81°
65°
31
79°
64°
1
83°
66°
2
88°
67°
3
88°
67°
4
87°
66°
5
84°
65°
6
84°
66°
7
88°
59°
8
88°
55°
9
80°
55°
10
79°
57°
11
82°
54°
12
78°
53°
13
78°
54°
14
77°
60°
15
77°
57°
16
79°
54°
17
80°
59°
18
82°
56°
19
85°
61°
20
86°
61°
21
85°
62°
22
85°
61°
23
78°
61°
24
80°
60°
25
79°
60°
26
84°
53°
27
78°
51°
28
76°
50°
29
74°
50°
30
75°
49°
31
74°
49°
1
75°
50°
2
73°
49°
3
74°
56°
4
76°
52°
5
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Groton
Groton's August 2026 forecast shows daily high temperatures ranging from 73° to 88°, with overnight lows between 49° and 67°. The average high for August is 81° with an average low of 58°. 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 Groton. See also: September | October | November.
