S
M
T
W
T
F
S
30
81°
58°
31
92°
71°
1
94°
71°
2
98°
73°
3
94°
71°
4
97°
72°
5
88°
66°
6
83°
59°
7
82°
58°
8
85°
59°
9
78°
59°
10
78°
58°
11
81°
57°
12
86°
58°
13
86°
48°
14
72°
48°
15
85°
63°
16
73°
65°
17
88°
66°
18
88°
66°
19
72°
64°
20
71°
60°
21
64°
57°
22
66°
54°
23
68°
54°
24
71°
54°
25
71°
50°
26
74°
50°
27
76°
45°
28
72°
46°
29
81°
48°
30
69°
61°
1
71°
54°
2
68°
43°
3
71°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Seneca
Seneca's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Seneca. See also: October | November | December.
