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°
50°
20
55°
51°
21
65°
47°
22
75°
45°
23
70°
51°
24
78°
51°
25
78°
51°
26
74°
53°
27
68°
46°
28
68°
48°
29
74°
47°
30
75°
51°
1
67°
46°
2
80°
40°
3
68°
48°
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 ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
