S
M
T
W
T
F
S
30
84°
62°
31
83°
61°
1
84°
59°
2
83°
58°
3
82°
58°
4
82°
59°
5
83°
60°
6
82°
60°
7
86°
59°
8
85°
61°
9
84°
64°
10
82°
65°
11
87°
65°
12
88°
57°
13
85°
64°
14
81°
64°
15
86°
63°
16
85°
64°
17
86°
56°
18
84°
55°
19
78°
63°
20
84°
54°
21
85°
53°
22
76°
52°
23
76°
59°
24
80°
61°
25
Hist. Avg.
80°
54°
26
Hist. Avg.
79°
54°
27
Hist. Avg.
79°
54°
28
Hist. Avg.
78°
53°
29
Hist. Avg.
78°
53°
30
Hist. Avg.
77°
52°
1
Hist. Avg.
77°
52°
2
Hist. Avg.
76°
52°
3
Hist. Avg.
76°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Seneca
Seneca's September 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 52° and 65°. The average high for September is 83° with an average low of 60°. 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.
