S
M
T
W
T
F
S
30
70°
65°
31
73°
66°
1
84°
70°
2
83°
69°
3
79°
68°
4
77°
64°
5
76°
59°
6
74°
57°
7
76°
53°
8
80°
56°
9
78°
66°
10
74°
59°
11
72°
59°
12
78°
67°
13
75°
58°
14
68°
60°
15
78°
64°
16
71°
63°
17
72°
58°
18
67°
60°
19
66°
58°
20
67°
57°
21
66°
57°
22
67°
56°
23
66°
41°
24
70°
57°
25
63°
52°
26
68°
56°
27
72°
56°
28
70°
54°
29
66°
54°
30
69°
55°
1
71°
54°
2
66°
54°
3
65°
53°
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 63° to 78°, with overnight lows between 41° and 67°. The average high for September is 69° 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.
