S
M
T
W
T
F
S
30
75°
56°
31
73°
56°
1
73°
64°
2
73°
64°
3
77°
60°
4
75°
55°
5
69°
51°
6
67°
54°
7
68°
54°
8
67°
50°
9
65°
49°
10
68°
52°
11
68°
51°
12
65°
51°
13
64°
50°
14
65°
47°
15
63°
48°
16
67°
53°
17
69°
47°
18
61°
43°
19
61°
43°
20
68°
51°
21
70°
53°
22
71°
53°
23
71°
51°
24
69°
47°
25
68°
49°
26
69°
49°
27
70°
50°
28
69°
48°
29
67°
43°
30
58°
39°
1
57°
40°
2
64°
48°
3
67°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Stamford
Stamford's September 2026 forecast shows daily high temperatures ranging from 57° to 77°, with overnight lows between 39° and 64°. The average high for September is 67° with an average low of 50°. 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 Stamford. See also: October | November | December.
