S
M
T
W
T
F
S
30
75°
51°
31
76°
51°
1
73°
50°
2
73°
52°
3
74°
53°
4
72°
54°
5
74°
52°
6
73°
51°
7
71°
50°
8
72°
49°
9
70°
49°
10
71°
55°
11
71°
49°
12
72°
48°
13
74°
47°
14
73°
52°
15
74°
52°
16
70°
47°
17
68°
46°
18
70°
46°
19
71°
52°
20
71°
53°
21
74°
52°
22
70°
50°
23
73°
49°
24
71°
47°
25
68°
50°
26
65°
43°
27
71°
42°
28
62°
43°
29
61°
43°
30
65°
45°
1
64°
41°
2
61°
39°
3
Hist. Avg.
64°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rochester
Rochester's September 2026 forecast shows daily high temperatures ranging from 61° to 76°, with overnight lows between 39° and 55°. The average high for September is 70° with an average low of 49°. 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 Rochester. See also: October | November | December.
