S
M
T
W
T
F
S
30
81°
62°
31
78°
62°
1
80°
59°
2
72°
51°
3
71°
60°
4
81°
63°
5
80°
62°
6
80°
61°
7
79°
61°
8
76°
60°
9
76°
59°
10
77°
60°
11
70°
53°
12
69°
54°
13
70°
51°
14
77°
52°
15
72°
45°
16
66°
46°
17
65°
45°
18
63°
41°
19
64°
44°
20
64°
51°
21
64°
50°
22
71°
53°
23
73°
54°
24
74°
52°
25
74°
49°
26
73°
51°
27
73°
44°
28
63°
50°
29
70°
42°
30
64°
49°
1
72°
37°
2
64°
35°
3
54°
38°
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 54° to 81°, with overnight lows between 35° and 63°. The average high for September is 71° 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.
