S
M
T
W
T
F
S
30
78°
63°
31
81°
62°
1
81°
55°
2
80°
54°
3
79°
60°
4
80°
60°
5
76°
59°
6
76°
59°
7
73°
58°
8
76°
52°
9
73°
50°
10
71°
57°
11
73°
58°
12
78°
57°
13
78°
58°
14
76°
57°
15
77°
59°
16
71°
50°
17
70°
56°
18
Hist. Avg.
72°
51°
19
Hist. Avg.
72°
51°
20
Hist. Avg.
72°
51°
21
Hist. Avg.
71°
50°
22
Hist. Avg.
71°
50°
23
Hist. Avg.
70°
49°
24
Hist. Avg.
70°
49°
25
Hist. Avg.
69°
48°
26
Hist. Avg.
69°
48°
27
Hist. Avg.
68°
48°
28
Hist. Avg.
68°
47°
29
Hist. Avg.
67°
47°
30
Hist. Avg.
67°
46°
1
Hist. Avg.
66°
46°
2
Hist. Avg.
66°
45°
3
Hist. Avg.
65°
45°
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 70° to 81°, with overnight lows between 50° and 63°. The average high for September is 76° with an average low of 57°. 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.
