S
M
T
W
T
F
S
30
82°
69°
31
84°
63°
1
89°
63°
2
88°
64°
3
86°
70°
4
90°
70°
5
81°
68°
6
70°
64°
7
77°
66°
8
81°
64°
9
81°
55°
10
79°
50°
11
81°
54°
12
70°
50°
13
68°
45°
14
68°
60°
15
70°
49°
16
70°
59°
17
72°
60°
18
73°
64°
19
77°
58°
20
66°
54°
21
66°
53°
22
67°
49°
23
67°
52°
24
67°
53°
25
70°
55°
26
75°
52°
27
74°
54°
28
73°
53°
29
68°
52°
30
69°
49°
1
70°
50°
2
67°
50°
3
70°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kiester
Kiester's September 2026 forecast shows daily high temperatures ranging from 66° to 77°, with overnight lows between 49° and 64°. The average high for September is 70° with an average low of 54°. 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 Kiester. See also: October | November | December.