S
M
T
W
T
F
S
30
73°
52°
31
74°
58°
1
74°
60°
2
79°
60°
3
75°
51°
4
73°
49°
5
72°
51°
6
71°
50°
7
73°
55°
8
77°
54°
9
78°
57°
10
79°
50°
11
72°
52°
12
71°
55°
13
71°
48°
14
70°
49°
15
67°
50°
16
68°
49°
17
69°
53°
18
73°
45°
19
69°
46°
20
68°
45°
21
72°
45°
22
68°
52°
23
71°
52°
24
74°
53°
25
73°
52°
26
74°
53°
27
73°
53°
28
75°
49°
29
72°
48°
30
70°
52°
1
72°
51°
2
73°
42°
3
71°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Seneca
Lake Seneca's September 2026 forecast shows daily high temperatures ranging from 67° to 79°, with overnight lows between 39° and 60°. The average high for September is 72° 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 Lake Seneca. See also: October | November | December.
