S
M
T
W
T
F
S
30
77°
55°
31
74°
52°
1
71°
53°
2
71°
52°
3
70°
52°
4
71°
53°
5
70°
53°
6
70°
55°
7
72°
60°
8
71°
54°
9
70°
53°
10
71°
52°
11
70°
52°
12
69°
53°
13
70°
55°
14
69°
53°
15
68°
55°
16
70°
50°
17
69°
49°
18
69°
50°
19
68°
57°
20
73°
55°
21
66°
47°
22
65°
46°
23
Hist. Avg.
70°
52°
24
Hist. Avg.
69°
52°
25
Hist. Avg.
69°
51°
26
Hist. Avg.
68°
51°
27
Hist. Avg.
68°
50°
28
Hist. Avg.
67°
50°
29
Hist. Avg.
67°
50°
30
Hist. Avg.
66°
49°
1
Hist. Avg.
66°
49°
2
Hist. Avg.
66°
49°
3
Hist. Avg.
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Buffalo
Buffalo's September 2026 forecast shows daily high temperatures ranging from 65° to 77°, with overnight lows between 46° and 60°. The average high for September is 70° with an average low of 53°. 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.
