S
M
T
W
T
F
S
30
75°
64°
31
79°
65°
1
81°
65°
2
81°
64°
3
80°
58°
4
80°
56°
5
73°
58°
6
74°
63°
7
75°
63°
8
79°
62°
9
77°
61°
10
78°
62°
11
77°
61°
12
78°
60°
13
77°
62°
14
77°
62°
15
78°
61°
16
79°
58°
17
77°
61°
18
74°
58°
19
76°
56°
20
72°
52°
21
69°
50°
22
68°
56°
23
68°
55°
24
74°
51°
25
67°
49°
26
66°
50°
27
67°
54°
28
72°
56°
29
71°
52°
30
72°
51°
1
64°
54°
2
65°
47°
3
64°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Center Groton
Center Groton's September 2026 forecast shows daily high temperatures ranging from 64° to 81°, with overnight lows between 47° and 65°. The average high for September is 74° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Center Groton. See also: October | November | December.
