S
M
T
W
T
F
S
30
91°
66°
31
82°
68°
1
86°
61°
2
88°
64°
3
88°
63°
4
99°
61°
5
91°
66°
6
99°
68°
7
90°
70°
8
82°
66°
9
72°
59°
10
75°
50°
11
79°
52°
12
82°
54°
13
86°
54°
14
91°
57°
15
95°
61°
16
72°
64°
17
75°
57°
18
77°
59°
19
79°
59°
20
86°
54°
21
86°
59°
22
84°
59°
23
88°
54°
24
90°
54°
25
90°
54°
26
80°
62°
27
84°
67°
28
83°
68°
29
84°
67°
30
85°
65°
1
73°
58°
2
77°
56°
3
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lanta
Lanta's September 2026 forecast shows daily high temperatures ranging from 73° to 85°, with overnight lows between 56° and 68°. The average high for September is 80° with an average low of 63°. 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 Lanta. See also: October | November | December.