S
M
T
W
T
F
S
30
68°
53°
31
73°
50°
1
84°
51°
2
88°
51°
3
81°
49°
4
73°
44°
5
71°
46°
6
72°
48°
7
69°
50°
8
67°
48°
9
70°
49°
10
73°
49°
11
70°
47°
12
69°
44°
13
68°
43°
14
67°
44°
15
73°
53°
16
74°
52°
17
69°
51°
18
69°
49°
19
70°
50°
20
70°
49°
21
67°
48°
22
64°
48°
23
71°
48°
24
68°
47°
25
59°
46°
26
67°
46°
27
68°
48°
28
68°
47°
29
67°
46°
30
67°
45°
1
68°
46°
2
68°
46°
3
67°
45°
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 59° to 88°, with overnight lows between 43° and 53°. The average high for September is 70° with an average low of 48°. 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.
