S
M
T
W
T
F
S
30
75°
62°
31
70°
61°
1
78°
66°
2
85°
64°
3
85°
66°
4
81°
65°
5
77°
59°
6
73°
49°
7
75°
53°
8
78°
64°
9
81°
66°
10
76°
54°
11
68°
49°
12
77°
61°
13
78°
60°
14
73°
54°
15
71°
52°
16
70°
52°
17
69°
53°
18
67°
54°
19
71°
49°
20
75°
55°
21
68°
55°
22
66°
55°
23
68°
54°
24
69°
54°
25
71°
53°
26
73°
50°
27
65°
47°
28
71°
53°
29
73°
54°
30
73°
54°
1
72°
53°
2
71°
51°
3
70°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Manlius
Manlius's September 2026 forecast shows daily high temperatures ranging from 65° to 81°, with overnight lows between 47° and 66°. The average high for September is 72° with an average low of 54°. 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 Manlius. See also: October | November | December.