S
M
T
W
T
F
S
30
90°
49°
31
81°
47°
1
76°
50°
2
90°
54°
3
90°
59°
4
98°
57°
5
95°
62°
6
97°
58°
7
89°
58°
8
80°
53°
9
80°
45°
10
90°
46°
11
75°
50°
12
65°
47°
13
74°
42°
14
70°
51°
15
68°
43°
16
79°
48°
17
78°
44°
18
74°
57°
19
64°
56°
20
56°
51°
21
60°
51°
22
67°
49°
23
84°
55°
24
81°
51°
25
76°
48°
26
75°
51°
27
70°
48°
28
75°
57°
29
79°
49°
30
79°
45°
1
57°
48°
2
72°
47°
3
71°
42°
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 71° to 71°, with overnight lows between 42° and 42°. The average high for September is 71° with an average low of 42°. 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.
