S
M
T
W
T
F
S
30
68°
63°
31
72°
59°
1
68°
57°
2
72°
54°
3
72°
61°
4
67°
56°
5
63°
51°
6
67°
54°
7
77°
59°
8
66°
51°
9
61°
50°
10
62°
50°
11
64°
51°
12
64°
51°
13
63°
50°
14
64°
49°
15
62°
50°
16
63°
49°
17
62°
53°
18
64°
52°
19
66°
53°
20
67°
52°
21
66°
52°
22
66°
51°
23
65°
52°
24
65°
52°
25
64°
51°
26
65°
52°
27
64°
51°
28
64°
51°
29
63°
50°
30
62°
47°
1
57°
46°
2
57°
43°
3
56°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Siek
Siek's September 2026 forecast shows daily high temperatures ranging from 56° to 77°, with overnight lows between 43° and 59°. The average high for September is 64° with an average low of 51°. 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 Siek. See also: October | November | December.
