S
M
T
W
T
F
S
30
84°
66°
31
86°
71°
1
86°
64°
2
87°
64°
3
83°
70°
4
91°
74°
5
78°
69°
6
76°
64°
7
78°
64°
8
80°
63°
9
77°
54°
10
76°
60°
11
79°
60°
12
77°
56°
13
65°
54°
14
68°
51°
15
70°
54°
16
75°
56°
17
75°
55°
18
72°
56°
19
70°
48°
20
76°
55°
21
68°
52°
22
71°
54°
23
73°
54°
24
73°
53°
25
72°
53°
26
71°
52°
27
73°
54°
28
72°
54°
29
70°
53°
30
70°
51°
1
65°
44°
2
58°
41°
3
57°
39°
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 57° to 80°, with overnight lows between 39° and 64°. 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 Rochester. See also: October | November | December.
