S
M
T
W
T
F
S
30
98°
77°
31
97°
75°
1
99°
67°
2
99°
67°
3
97°
70°
4
97°
69°
5
100°
68°
6
99°
71°
7
92°
71°
8
100°
74°
9
82°
72°
10
87°
61°
11
87°
58°
12
77°
59°
13
80°
57°
14
96°
58°
15
87°
64°
16
87°
64°
17
92°
68°
18
98°
75°
19
96°
70°
20
71°
64°
21
71°
59°
22
67°
51°
23
68°
52°
24
70°
59°
25
72°
63°
26
73°
59°
27
73°
54°
28
74°
55°
29
74°
54°
30
73°
55°
1
75°
55°
2
74°
51°
3
75°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Iatan
Iatan's September 2026 forecast shows daily high temperatures ranging from 67° to 75°, with overnight lows between 51° and 64°. The average high for September is 72° with an average low of 56°. 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 Iatan. See also: October | November | December.