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
75°
57°
14
67°
55°
15
76°
66°
16
76°
63°
17
74°
62°
18
70°
60°
19
71°
58°
20
66°
56°
21
69°
57°
22
65°
57°
23
67°
58°
24
69°
57°
25
71°
58°
26
68°
53°
27
72°
56°
28
73°
55°
29
67°
54°
30
66°
54°
1
69°
55°
2
71°
53°
3
67°
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 65° to 76°, with overnight lows between 53° and 66°. The average high for September is 70° 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.
