S
M
T
W
T
F
S
30
78°
60°
31
80°
63°
1
82°
58°
2
80°
56°
3
78°
55°
4
76°
56°
5
79°
58°
6
83°
63°
7
86°
66°
8
87°
64°
9
83°
56°
10
78°
56°
11
78°
64°
12
80°
55°
13
85°
53°
14
76°
52°
15
75°
54°
16
76°
61°
17
81°
60°
18
82°
53°
19
76°
60°
20
80°
60°
21
83°
59°
22
83°
59°
23
82°
60°
24
81°
60°
25
82°
59°
26
80°
59°
27
81°
58°
28
82°
57°
29
82°
58°
30
81°
58°
1
81°
49°
2
82°
47°
3
78°
47°
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 75° to 87°, with overnight lows between 47° and 66°. The average high for September is 80° with an average low of 58°. 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.