S
M
T
W
T
F
S
30
91°
75°
31
90°
76°
1
90°
75°
2
89°
76°
3
90°
76°
4
90°
75°
5
88°
76°
6
89°
75°
7
88°
76°
8
87°
75°
9
87°
76°
10
88°
76°
11
88°
75°
12
89°
75°
13
86°
74°
14
85°
75°
15
85°
75°
16
86°
74°
17
85°
74°
18
85°
73°
19
86°
70°
20
84°
69°
21
83°
72°
22
84°
72°
23
85°
73°
24
84°
72°
25
86°
73°
26
85°
72°
27
86°
72°
28
85°
71°
29
85°
71°
30
85°
72°
1
83°
71°
2
84°
69°
3
Hist. Avg.
85°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Montegut
Montegut's September 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 69° and 76°. The average high for September is 87° with an average low of 74°. 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 Montegut. See also: October | November | December.