S
M
T
W
T
F
S
30
75°
57°
31
76°
57°
1
74°
58°
2
74°
58°
3
75°
60°
4
72°
59°
5
75°
57°
6
74°
58°
7
72°
57°
8
73°
55°
9
71°
56°
10
72°
61°
11
72°
55°
12
73°
55°
13
75°
54°
14
73°
60°
15
74°
60°
16
73°
56°
17
70°
53°
18
70°
53°
19
71°
57°
20
72°
59°
21
73°
58°
22
70°
56°
23
74°
57°
24
72°
56°
25
73°
57°
26
67°
49°
27
72°
51°
28
65°
50°
29
64°
50°
30
67°
50°
1
66°
49°
2
64°
46°
3
Hist. Avg.
68°
52°
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 76°, with overnight lows between 46° and 61°. The average high for September is 72° with an average low of 55°. 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.
