S
M
T
W
T
F
S
30
82°
57°
31
82°
51°
1
78°
50°
2
74°
52°
3
74°
51°
4
75°
50°
5
73°
50°
6
72°
49°
7
73°
49°
8
73°
50°
9
72°
54°
10
71°
49°
11
73°
52°
12
75°
50°
13
76°
52°
14
75°
51°
15
70°
48°
16
70°
48°
17
67°
47°
18
69°
50°
19
73°
52°
20
Hist. Avg.
69°
45°
21
Hist. Avg.
69°
44°
22
Hist. Avg.
68°
44°
23
Hist. Avg.
68°
44°
24
Hist. Avg.
68°
43°
25
Hist. Avg.
67°
43°
26
Hist. Avg.
67°
43°
27
Hist. Avg.
67°
42°
28
Hist. Avg.
66°
42°
29
Hist. Avg.
66°
41°
30
Hist. Avg.
66°
41°
1
Hist. Avg.
65°
41°
2
Hist. Avg.
65°
40°
3
Hist. Avg.
64°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rochester
Rochester's September 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 47° and 57°. The average high for September is 74° 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 Rochester. See also: October | November | December.
