S
M
T
W
T
F
S
30
81°
66°
31
N/A
1
75°
55°
2
75°
55°
3
76°
61°
4
82°
62°
5
80°
57°
6
80°
59°
7
79°
60°
8
78°
59°
9
77°
61°
10
75°
58°
11
73°
55°
12
71°
54°
13
68°
50°
14
68°
47°
15
69°
47°
16
68°
46°
17
68°
50°
18
71°
52°
19
71°
53°
20
70°
51°
21
70°
49°
22
69°
52°
23
72°
53°
24
71°
53°
25
69°
49°
26
67°
46°
27
68°
46°
28
68°
46°
29
67°
50°
30
68°
50°
1
68°
48°
2
67°
48°
3
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Frankfurt
Frankfurt's September 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 46° and 62°. The average high for September is 72° with an average low of 52°. 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.
