S
M
T
W
T
F
S
30
80°
60°
31
81°
63°
1
85°
60°
2
85°
62°
3
84°
59°
4
79°
55°
5
78°
61°
6
82°
61°
7
81°
60°
8
83°
61°
9
81°
59°
10
77°
60°
11
83°
59°
12
84°
60°
13
83°
59°
14
83°
59°
15
82°
58°
16
82°
59°
17
81°
57°
18
81°
51°
19
74°
50°
20
75°
48°
21
73°
48°
22
73°
49°
23
76°
51°
24
77°
48°
25
73°
50°
26
76°
55°
27
72°
53°
28
77°
53°
29
76°
54°
30
77°
52°
1
75°
50°
2
76°
51°
3
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Seth
Seth's September 2026 forecast shows daily high temperatures ranging from 72° to 85°, with overnight lows between 48° and 63°. The average high for September is 79° 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 Seth. See also: October | November | December.