S
M
T
W
T
F
S
30
85°
64°
31
86°
64°
1
85°
63°
2
86°
65°
3
86°
65°
4
85°
64°
5
85°
63°
6
84°
64°
7
85°
62°
8
79°
61°
9
82°
61°
10
82°
60°
11
83°
61°
12
83°
60°
13
82°
59°
14
69°
53°
15
70°
57°
16
70°
56°
17
73°
54°
18
70°
46°
19
75°
52°
20
76°
56°
21
75°
55°
22
72°
55°
23
77°
52°
24
70°
55°
25
68°
55°
26
69°
50°
27
77°
41°
28
68°
43°
29
68°
49°
30
67°
49°
1
71°
54°
2
74°
55°
3
77°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Schleswig
Schleswig's September 2026 forecast shows daily high temperatures ranging from 67° to 86°, with overnight lows between 41° and 65°. The average high for September is 77° with an average low of 56°. 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 Schleswig. See also: October | November | December.