S
M
T
W
T
F
S
30
89°
68°
31
82°
68°
1
83°
67°
2
84°
68°
3
84°
68°
4
86°
67°
5
87°
67°
6
88°
68°
7
88°
68°
8
87°
67°
9
87°
67°
10
88°
68°
11
88°
67°
12
87°
66°
13
87°
65°
14
86°
65°
15
86°
64°
16
85°
65°
17
85°
65°
18
84°
64°
19
85°
63°
20
84°
64°
21
82°
63°
22
83°
62°
23
84°
60°
24
82°
59°
25
75°
58°
26
78°
57°
27
80°
57°
28
84°
56°
29
84°
58°
30
84°
58°
1
83°
57°
2
82°
58°
3
81°
58°
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 75° to 89°, with overnight lows between 56° and 68°. The average high for September is 84° with an average low of 63°. 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.
