S
M
T
W
T
F
S
31
78°
55°
1
80°
57°
2
66°
56°
3
77°
55°
4
83°
58°
5
72°
59°
6
67°
54°
7
72°
51°
8
72°
53°
9
78°
55°
10
76°
59°
11
74°
55°
12
69°
52°
13
71°
49°
14
63°
50°
15
72°
49°
16
64°
50°
17
64°
52°
18
64°
51°
19
72°
60°
20
82°
56°
21
81°
57°
22
57°
51°
23
62°
44°
24
62°
40°
25
61°
45°
26
62°
45°
27
66°
44°
28
63°
42°
29
60°
41°
30
52°
40°
1
54°
44°
2
58°
41°
3
55°
35°
4
49°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Frankfurt
Frankfurt's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
