S
M
T
W
T
F
S
30
76°
55°
31
77°
58°
1
78°
57°
2
77°
57°
3
77°
56°
4
76°
52°
5
71°
51°
6
74°
50°
7
75°
54°
8
74°
53°
9
71°
52°
10
68°
49°
11
67°
49°
12
67°
48°
13
66°
49°
14
66°
47°
15
67°
48°
16
68°
46°
17
68°
46°
18
65°
45°
19
66°
48°
20
65°
45°
21
65°
44°
22
64°
45°
23
64°
46°
24
65°
45°
25
64°
43°
26
62°
48°
27
63°
50°
28
68°
48°
29
69°
47°
30
Hist. Avg.
61°
47°
1
Hist. Avg.
61°
46°
2
Hist. Avg.
60°
46°
3
Hist. Avg.
60°
46°
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 62° to 78°, with overnight lows between 43° and 58°. The average high for September is 69° with an average low of 49°. 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.
