S
M
T
W
T
F
S
30
74°
55°
31
77°
57°
1
81°
56°
2
81°
53°
3
77°
48°
4
79°
53°
5
79°
49°
6
78°
47°
7
71°
51°
8
70°
53°
9
72°
49°
10
71°
44°
11
70°
53°
12
76°
45°
13
75°
49°
14
74°
47°
15
69°
52°
16
76°
49°
17
Hist. Avg.
73°
49°
18
Hist. Avg.
72°
48°
19
Hist. Avg.
72°
48°
20
Hist. Avg.
71°
47°
21
Hist. Avg.
71°
47°
22
Hist. Avg.
70°
46°
23
Hist. Avg.
70°
46°
24
Hist. Avg.
70°
46°
25
Hist. Avg.
69°
45°
26
Hist. Avg.
69°
45°
27
Hist. Avg.
68°
44°
28
Hist. Avg.
68°
44°
29
Hist. Avg.
67°
44°
30
Hist. Avg.
67°
43°
1
Hist. Avg.
66°
43°
2
Hist. Avg.
66°
42°
3
Hist. Avg.
65°
42°
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 69° to 81°, with overnight lows between 44° and 57°. The average high for September is 75° 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.
