S
M
T
W
T
F
S
30
88°
60°
31
87°
57°
1
83°
57°
2
82°
58°
3
83°
59°
4
85°
61°
5
88°
63°
6
87°
62°
7
87°
60°
8
85°
55°
9
80°
54°
10
80°
54°
11
81°
54°
12
80°
55°
13
79°
53°
14
78°
54°
15
79°
53°
16
80°
56°
17
79°
55°
18
80°
58°
19
84°
58°
20
80°
57°
21
Hist. Avg.
82°
56°
22
Hist. Avg.
81°
56°
23
Hist. Avg.
81°
56°
24
Hist. Avg.
80°
55°
25
Hist. Avg.
80°
55°
26
Hist. Avg.
80°
54°
27
Hist. Avg.
79°
54°
28
Hist. Avg.
79°
53°
29
Hist. Avg.
78°
53°
30
Hist. Avg.
78°
52°
1
Hist. Avg.
78°
52°
2
Hist. Avg.
77°
52°
3
Hist. Avg.
77°
51°
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 78° to 88°, with overnight lows between 53° and 63°. The average high for September is 83° 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.
