S
M
T
W
T
F
S
30
83°
65°
31
84°
61°
1
81°
59°
2
81°
58°
3
80°
57°
4
80°
57°
5
81°
58°
6
81°
61°
7
82°
58°
8
81°
57°
9
80°
56°
10
81°
61°
11
85°
62°
12
84°
63°
13
84°
62°
14
83°
63°
15
85°
62°
16
84°
61°
17
83°
62°
18
84°
61°
19
83°
60°
20
79°
59°
21
82°
52°
22
76°
51°
23
75°
57°
24
75°
59°
25
Hist. Avg.
77°
49°
26
Hist. Avg.
77°
49°
27
Hist. Avg.
77°
48°
28
Hist. Avg.
76°
48°
29
Hist. Avg.
76°
48°
30
Hist. Avg.
76°
47°
1
Hist. Avg.
75°
47°
2
Hist. Avg.
75°
47°
3
Hist. Avg.
75°
46°
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 75° to 85°, with overnight lows between 51° and 65°. The average high for September is 81° with an average low of 59°. 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.
