S
M
T
W
T
F
S
30
89°
60°
31
87°
60°
1
86°
59°
2
88°
59°
3
83°
58°
4
76°
57°
5
85°
59°
6
86°
56°
7
74°
52°
8
77°
56°
9
82°
55°
10
84°
57°
11
83°
55°
12
82°
52°
13
69°
45°
14
70°
51°
15
80°
55°
16
81°
50°
17
72°
51°
18
82°
39°
19
77°
39°
20
64°
40°
21
65°
48°
22
72°
52°
23
79°
50°
24
80°
51°
25
77°
47°
26
77°
39°
27
67°
35°
28
59°
33°
29
58°
33°
30
56°
36°
1
60°
45°
2
68°
47°
3
72°
39°
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 56° to 89°, with overnight lows between 33° and 60°. The average high for September is 76° with an average low of 49°. 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.
