S
M
T
W
T
F
S
30
80°
58°
31
80°
57°
1
79°
57°
2
77°
52°
3
73°
52°
4
75°
53°
5
76°
52°
6
75°
51°
7
77°
54°
8
77°
57°
9
76°
56°
10
76°
55°
11
75°
57°
12
76°
56°
13
75°
56°
14
76°
48°
15
69°
48°
16
70°
50°
17
72°
53°
18
74°
47°
19
67°
48°
20
67°
53°
21
66°
54°
22
72°
53°
23
65°
44°
24
65°
47°
25
Hist. Avg.
63°
48°
26
Hist. Avg.
63°
48°
27
Hist. Avg.
63°
48°
28
Hist. Avg.
62°
48°
29
Hist. Avg.
62°
47°
30
Hist. Avg.
62°
47°
1
Hist. Avg.
61°
47°
2
Hist. Avg.
61°
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 Karlsruhe
Karlsruhe's September 2026 forecast shows daily high temperatures ranging from 65° to 80°, with overnight lows between 44° and 58°. The average high for September is 73° with an average low of 53°. 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 Karlsruhe. See also: October | November | December.
