S
M
T
W
T
F
S
28
77°
58°
29
77°
60°
30
78°
61°
1
78°
58°
2
77°
56°
3
74°
57°
4
75°
55°
5
74°
53°
6
75°
59°
7
81°
61°
8
82°
62°
9
82°
61°
10
77°
60°
11
78°
61°
12
82°
58°
13
74°
55°
14
75°
56°
15
76°
60°
16
81°
59°
17
76°
54°
18
74°
53°
19
75°
61°
20
75°
61°
21
76°
60°
22
75°
58°
23
75°
55°
24
76°
54°
25
75°
56°
26
79°
61°
27
82°
55°
28
78°
54°
29
75°
60°
30
81°
59°
31
77°
60°
1
81°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Groton
Groton's July 2026 forecast shows daily high temperatures ranging from 74° to 82°, with overnight lows between 53° and 62°. The average high for July is 77° 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 July weather will actually feel in Groton. See also: August | September | October.
