S
M
T
W
T
F
S
30
71°
57°
31
71°
57°
1
72°
61°
2
74°
62°
3
74°
62°
4
75°
63°
5
77°
62°
6
79°
63°
7
76°
62°
8
75°
61°
9
73°
61°
10
74°
60°
11
73°
61°
12
72°
61°
13
72°
60°
14
75°
59°
15
74°
59°
16
74°
58°
17
73°
59°
18
75°
59°
19
75°
58°
20
71°
58°
21
77°
56°
22
76°
47°
23
67°
45°
24
65°
53°
25
70°
55°
26
68°
54°
27
70°
55°
28
73°
53°
29
74°
56°
30
74°
57°
1
73°
53°
2
73°
50°
3
69°
54°
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 65° to 79°, with overnight lows between 45° and 63°. The average high for September is 73° with an average low of 57°. 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.
