S
M
T
W
T
F
S
30
89°
63°
31
88°
63°
1
89°
64°
2
88°
65°
3
89°
62°
4
84°
61°
5
85°
61°
6
87°
65°
7
88°
64°
8
88°
64°
9
87°
63°
10
88°
64°
11
88°
64°
12
87°
65°
13
87°
64°
14
86°
63°
15
86°
60°
16
85°
61°
17
86°
62°
18
86°
58°
19
85°
61°
20
83°
62°
21
84°
62°
22
85°
61°
23
85°
60°
24
83°
61°
25
83°
56°
26
82°
60°
27
82°
59°
28
79°
59°
29
Hist. Avg.
80°
62°
30
Hist. Avg.
80°
61°
1
Hist. Avg.
80°
61°
2
Hist. Avg.
79°
60°
3
Hist. Avg.
79°
60°
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 79° to 89°, with overnight lows between 56° and 65°. 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.
