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
78°
62°
11
73°
54°
12
81°
55°
13
78°
61°
14
68°
52°
15
79°
52°
16
77°
66°
17
79°
65°
18
72°
57°
19
64°
53°
20
68°
54°
21
61°
49°
22
64°
47°
23
68°
48°
24
68°
44°
25
68°
42°
26
70°
56°
27
67°
57°
28
65°
57°
29
70°
59°
30
71°
61°
1
71°
56°
2
70°
57°
3
66°
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 71°, with overnight lows between 54° and 61°. 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.
