S
M
T
W
T
F
S
30
81°
66°
31
73°
59°
1
77°
54°
2
77°
54°
3
79°
54°
4
88°
63°
5
75°
59°
6
79°
48°
7
88°
63°
8
86°
59°
9
75°
55°
10
N/A
11
75°
55°
12
76°
57°
13
71°
59°
14
75°
57°
15
81°
55°
16
69°
50°
17
71°
52°
18
65°
53°
19
67°
54°
20
70°
53°
21
67°
53°
22
69°
54°
23
68°
53°
24
71°
52°
25
71°
51°
26
64°
48°
27
62°
51°
28
64°
45°
29
63°
43°
30
59°
45°
1
58°
43°
2
60°
42°
3
61°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Frankfurt
Frankfurt's September 2026 forecast shows daily high temperatures ranging from 58° to 81°, with overnight lows between 42° and 59°. The average high for September is 68° 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 Frankfurt. See also: October | November | December.
