S
M
T
W
T
F
S
30
78°
60°
31
80°
64°
1
83°
64°
2
83°
63°
3
84°
57°
4
81°
55°
5
76°
56°
6
76°
61°
7
77°
61°
8
80°
62°
9
81°
60°
10
77°
61°
11
80°
60°
12
81°
61°
13
80°
61°
14
78°
60°
15
81°
61°
16
81°
56°
17
79°
60°
18
77°
54°
19
78°
52°
20
72°
51°
21
70°
49°
22
69°
56°
23
70°
53°
24
75°
49°
25
69°
48°
26
68°
48°
27
70°
50°
28
74°
54°
29
73°
52°
30
74°
51°
1
68°
53°
2
68°
46°
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 68° to 84°, with overnight lows between 46° and 64°. The average high for September is 76° with an average low of 56°. 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.
