S
M
T
W
T
F
S
30
78°
64°
31
86°
70°
1
89°
73°
2
91°
73°
3
88°
70°
4
84°
70°
5
82°
65°
6
78°
62°
7
75°
61°
8
74°
62°
9
77°
61°
10
73°
63°
11
71°
58°
12
73°
58°
13
72°
59°
14
75°
57°
15
77°
62°
16
77°
63°
17
76°
62°
18
76°
62°
19
78°
63°
20
78°
63°
21
77°
62°
22
78°
62°
23
77°
61°
24
77°
62°
25
76°
61°
26
77°
61°
27
76°
60°
28
76°
60°
29
75°
59°
30
74°
58°
1
74°
58°
2
73°
57°
3
74°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New Buffalo
New Buffalo's September 2026 forecast shows daily high temperatures ranging from 71° to 91°, with overnight lows between 57° and 73°. The average high for September is 77° 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 New Buffalo. See also: October | November | December.
