S
M
T
W
T
F
S
26
80°
56°
27
75°
57°
28
77°
70°
29
76°
69°
30
74°
66°
31
79°
64°
1
79°
64°
2
79°
70°
3
77°
66°
4
79°
59°
5
78°
59°
6
84°
73°
7
86°
73°
8
85°
71°
9
86°
70°
10
83°
62°
11
84°
69°
12
83°
68°
13
80°
67°
14
80°
64°
15
77°
60°
16
77°
59°
17
72°
66°
18
76°
66°
19
82°
68°
20
82°
64°
21
68°
63°
22
71°
64°
23
N/A
24
80°
59°
25
77°
60°
26
77°
62°
27
78°
68°
28
78°
64°
29
80°
61°
30
77°
64°
31
75°
60°
1
75°
63°
2
76°
62°
3
73°
58°
4
75°
59°
5
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Groton
Groton's August 2026 forecast shows daily high temperatures ranging from 73° to 80°, with overnight lows between 58° and 68°. The average high for August is 77° with an average low of 62°. 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.
