S
M
T
W
T
F
S
30
79°
61°
31
80°
59°
1
81°
54°
2
78°
53°
3
79°
52°
4
74°
55°
5
79°
55°
6
79°
58°
7
78°
50°
8
71°
47°
9
69°
54°
10
70°
57°
11
76°
49°
12
77°
58°
13
76°
55°
14
77°
56°
15
76°
56°
16
68°
50°
17
68°
48°
18
68°
45°
19
Hist. Avg.
70°
49°
20
Hist. Avg.
70°
48°
21
Hist. Avg.
69°
48°
22
Hist. Avg.
69°
48°
23
Hist. Avg.
68°
47°
24
Hist. Avg.
68°
46°
25
Hist. Avg.
68°
46°
26
Hist. Avg.
67°
46°
27
Hist. Avg.
67°
45°
28
Hist. Avg.
66°
45°
29
Hist. Avg.
66°
44°
30
Hist. Avg.
66°
44°
1
Hist. Avg.
65°
44°
2
Hist. Avg.
65°
43°
3
Hist. Avg.
64°
43°
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 68° to 81°, with overnight lows between 45° and 61°. The average high for September is 75° 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.
