S
M
T
W
T
F
S
30
79°
60°
31
79°
59°
1
73°
55°
2
73°
56°
3
71°
56°
4
71°
58°
5
74°
56°
6
69°
55°
7
71°
53°
8
73°
54°
9
66°
50°
10
65°
52°
11
71°
55°
12
72°
54°
13
65°
53°
14
64°
52°
15
65°
49°
16
68°
48°
17
70°
52°
18
70°
51°
19
69°
53°
20
69°
52°
21
67°
51°
22
67°
51°
23
64°
50°
24
66°
48°
25
66°
51°
26
61°
49°
27
66°
50°
28
67°
51°
29
67°
51°
30
66°
50°
1
66°
49°
2
65°
50°
3
66°
51°
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 61° to 79°, with overnight lows between 48° and 60°. The average high for September is 69° 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.
