S
M
T
W
T
F
S
30
78°
61°
31
82°
63°
1
84°
57°
2
82°
56°
3
77°
55°
4
78°
57°
5
77°
63°
6
82°
62°
7
84°
59°
8
76°
61°
9
75°
62°
10
79°
61°
11
78°
60°
12
79°
60°
13
77°
59°
14
74°
53°
15
74°
53°
16
73°
52°
17
73°
54°
18
74°
58°
19
75°
58°
20
76°
59°
21
78°
55°
22
73°
50°
23
71°
56°
24
70°
58°
25
76°
51°
26
75°
49°
27
Hist. Avg.
70°
52°
28
Hist. Avg.
70°
52°
29
Hist. Avg.
69°
52°
30
Hist. Avg.
69°
51°
1
Hist. Avg.
69°
51°
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
*Temporarily Unavailable
September Weather in Stamford
Stamford's September 2026 forecast shows daily high temperatures ranging from 70° to 84°, with overnight lows between 49° and 63°. The average high for September is 77° 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 Stamford. See also: October | November | December.
