S
M
T
W
T
F
S
30
75°
59°
31
78°
57°
1
79°
55°
2
78°
49°
3
70°
52°
4
72°
57°
5
70°
53°
6
77°
48°
7
71°
46°
8
69°
46°
9
68°
54°
10
70°
55°
11
72°
54°
12
75°
53°
13
75°
46°
14
67°
45°
15
64°
44°
16
65°
45°
17
65°
46°
18
67°
44°
19
68°
40°
20
62°
43°
21
63°
51°
22
66°
47°
23
72°
47°
24
70°
51°
25
71°
51°
26
69°
50°
27
72°
44°
28
70°
40°
29
62°
46°
30
58°
47°
1
64°
45°
2
67°
48°
3
57°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Siren
Siren's September 2026 forecast shows daily high temperatures ranging from 57° to 79°, with overnight lows between 36° and 59°. The average high for September is 69° with an average low of 48°. 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 Siren. See also: October | November | December.
