S
M
T
W
T
F
S
30
88°
69°
31
88°
69°
1
89°
68°
2
89°
69°
3
88°
68°
4
88°
68°
5
87°
67°
6
88°
68°
7
88°
67°
8
89°
67°
9
89°
68°
10
88°
67°
11
88°
68°
12
87°
67°
13
88°
67°
14
85°
63°
15
83°
63°
16
84°
61°
17
85°
62°
18
87°
55°
19
76°
54°
20
76°
56°
21
81°
55°
22
82°
56°
23
84°
60°
24
82°
58°
25
79°
59°
26
82°
59°
27
79°
58°
28
81°
58°
29
75°
51°
30
74°
53°
1
79°
55°
2
81°
55°
3
81°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Buffalo Valley
Buffalo Valley's September 2026 forecast shows daily high temperatures ranging from 74° to 89°, with overnight lows between 51° and 69°. The average high for September is 84° 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 Valley. See also: October | November | December.