S
M
T
W
T
F
S
30
63°
54°
31
64°
49°
1
60°
49°
2
61°
46°
3
61°
50°
4
65°
51°
5
58°
46°
6
62°
43°
7
79°
63°
8
80°
58°
9
67°
50°
10
64°
46°
11
68°
51°
12
69°
54°
13
70°
55°
14
69°
54°
15
70°
56°
16
65°
51°
17
64°
51°
18
65°
48°
19
66°
49°
20
66°
53°
21
65°
53°
22
66°
52°
23
67°
52°
24
68°
51°
25
68°
51°
26
66°
48°
27
63°
45°
28
61°
44°
29
62°
44°
30
62°
50°
1
61°
49°
2
63°
46°
3
63°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Helmstedt
Helmstedt's September 2026 forecast shows daily high temperatures ranging from 61° to 80°, with overnight lows between 44° and 63°. The average high for September is 67° with an average low of 51°. 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 Helmstedt. See also: October | November | December.