S
M
T
W
T
F
S
30
81°
63°
31
83°
63°
1
83°
59°
2
82°
56°
3
81°
61°
4
80°
61°
5
80°
60°
6
76°
60°
7
76°
59°
8
77°
52°
9
75°
51°
10
74°
60°
11
76°
58°
12
80°
59°
13
80°
59°
14
79°
57°
15
80°
58°
16
73°
50°
17
73°
51°
18
72°
49°
19
Hist. Avg.
75°
52°
20
Hist. Avg.
75°
52°
21
Hist. Avg.
74°
51°
22
Hist. Avg.
74°
51°
23
Hist. Avg.
74°
50°
24
Hist. Avg.
73°
50°
25
Hist. Avg.
73°
50°
26
Hist. Avg.
72°
49°
27
Hist. Avg.
72°
49°
28
Hist. Avg.
72°
49°
29
Hist. Avg.
71°
48°
30
Hist. Avg.
71°
48°
1
Hist. Avg.
70°
48°
2
Hist. Avg.
70°
47°
3
Hist. Avg.
70°
47°
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 72° to 83°, with overnight lows between 49° and 63°. The average high for September is 78° 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.
