S
M
T
W
T
F
S
30
103°
79°
31
103°
77°
1
101°
73°
2
102°
78°
3
104°
79°
4
102°
74°
5
101°
79°
6
101°
75°
7
102°
74°
8
104°
80°
9
101°
70°
10
87°
70°
11
96°
75°
12
100°
75°
13
102°
77°
14
101°
68°
15
82°
60°
16
83°
61°
17
85°
59°
18
82°
58°
19
79°
59°
20
80°
58°
21
85°
57°
22
89°
65°
23
88°
64°
24
82°
63°
25
80°
63°
26
83°
62°
27
84°
62°
28
80°
61°
29
77°
56°
30
82°
50°
1
72°
48°
2
73°
47°
3
72°
49°
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 72° to 104°, with overnight lows between 47° and 80°. The average high for September is 86° with an average low of 62°. 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.
