S
M
T
W
T
F
S
30
84°
59°
31
87°
53°
1
84°
50°
2
76°
52°
3
75°
55°
4
76°
55°
5
85°
45°
6
74°
45°
7
72°
46°
8
73°
54°
9
78°
51°
10
81°
53°
11
79°
50°
12
81°
47°
13
72°
43°
14
71°
42°
15
69°
42°
16
70°
44°
17
71°
51°
18
78°
41°
19
69°
45°
20
68°
51°
21
78°
50°
22
78°
50°
23
76°
51°
24
76°
51°
25
77°
49°
26
77°
45°
27
71°
42°
28
63°
45°
29
64°
44°
30
62°
41°
1
61°
46°
2
62°
47°
3
58°
32°
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 58° to 87°, with overnight lows between 32° and 59°. The average high for September is 74° with an average low of 48°. 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.
