S
M
T
W
T
F
S
30
73°
61°
31
78°
58°
1
71°
55°
2
72°
52°
3
68°
58°
4
66°
59°
5
66°
56°
6
68°
54°
7
76°
55°
8
74°
60°
9
69°
55°
10
68°
50°
11
68°
43°
12
69°
56°
13
67°
57°
14
66°
51°
15
76°
49°
16
68°
55°
17
65°
52°
18
66°
55°
19
67°
59°
20
65°
52°
21
62°
48°
22
63°
42°
23
64°
50°
24
63°
49°
25
62°
50°
26
66°
47°
27
68°
53°
28
69°
51°
29
66°
49°
30
67°
52°
1
68°
50°
2
64°
52°
3
62°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rostock
Rostock's September 2026 forecast shows daily high temperatures ranging from 62° to 69°, with overnight lows between 42° and 59°. The average high for September is 65° with an average low of 50°. 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 Rostock. See also: October | November | December.