S
M
T
W
T
F
S
30
78°
51°
31
79°
47°
1
82°
60°
2
88°
60°
3
86°
59°
4
93°
57°
5
82°
58°
6
88°
55°
7
85°
50°
8
76°
45°
9
78°
46°
10
87°
49°
11
76°
49°
12
71°
48°
13
84°
49°
14
68°
48°
15
69°
41°
16
71°
46°
17
76°
52°
18
81°
50°
19
63°
49°
20
58°
46°
21
69°
50°
22
75°
55°
23
73°
55°
24
78°
55°
25
80°
54°
26
74°
53°
27
71°
51°
28
66°
48°
29
63°
47°
30
68°
48°
1
63°
48°
2
66°
45°
3
67°
46°
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 58° to 80°, with overnight lows between 45° and 55°. The average high for September is 69° with an average low of 50°. 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.
