S
M
T
W
T
F
S
30
78°
57°
31
78°
56°
1
77°
57°
2
78°
58°
3
77°
59°
4
75°
58°
5
78°
58°
6
77°
57°
7
76°
55°
8
75°
54°
9
74°
55°
10
75°
60°
11
74°
54°
12
74°
54°
13
76°
53°
14
77°
59°
15
76°
59°
16
75°
56°
17
73°
52°
18
72°
52°
19
72°
53°
20
77°
58°
21
73°
52°
22
71°
54°
23
76°
56°
24
75°
57°
25
76°
55°
26
71°
48°
27
73°
49°
28
67°
48°
29
66°
47°
30
68°
49°
1
67°
47°
2
Hist. Avg.
68°
50°
3
Hist. Avg.
68°
50°
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 66° to 78°, with overnight lows between 47° and 60°. The average high for September is 74° with an average low of 54°. 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.
