S
M
T
W
T
F
S
30
84°
64°
31
88°
59°
1
85°
55°
2
86°
63°
3
86°
34°
4
84°
34°
5
84°
36°
6
79°
34°
7
82°
34°
8
82°
63°
9
77°
34°
10
79°
34°
11
84°
63°
12
71°
52°
13
70°
43°
14
61°
43°
15
69°
46°
16
72°
54°
17
74°
58°
18
64°
58°
19
66°
57°
20
69°
50°
21
68°
51°
22
67°
55°
23
68°
54°
24
69°
54°
25
71°
55°
26
70°
56°
27
67°
50°
28
66°
45°
29
66°
51°
30
68°
46°
1
68°
50°
2
64°
49°
3
67°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Buffalo
Buffalo's September 2026 forecast shows daily high temperatures ranging from 64° to 74°, with overnight lows between 45° and 58°. The average high for September is 68° with an average low of 52°. 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 Buffalo. See also: October | November | December.
