S
M
T
W
T
F
S
26
82°
63°
27
84°
64°
28
85°
64°
29
86°
65°
30
85°
66°
31
86°
65°
1
85°
64°
2
82°
61°
3
79°
58°
4
79°
59°
5
80°
62°
6
79°
63°
7
83°
63°
8
83°
62°
9
85°
64°
10
85°
64°
11
84°
63°
12
85°
63°
13
84°
64°
14
85°
61°
15
85°
63°
16
84°
63°
17
80°
62°
18
85°
64°
19
84°
63°
20
81°
57°
21
84°
54°
22
78°
55°
23
78°
54°
24
79°
57°
25
78°
54°
26
78°
56°
27
79°
54°
28
77°
53°
29
76°
52°
30
76°
52°
31
77°
51°
1
75°
51°
2
75°
53°
3
76°
53°
4
73°
55°
5
75°
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 86°, with overnight lows between 51° and 66°. The average high for August is 81° with an average low of 59°. 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.
