S
M
T
W
T
F
S
30
63°
54°
31
63°
54°
1
69°
55°
2
70°
54°
3
71°
53°
4
66°
51°
5
61°
52°
6
65°
50°
7
66°
52°
8
67°
52°
9
67°
51°
10
66°
50°
11
66°
47°
12
62°
44°
13
58°
44°
14
58°
42°
15
59°
47°
16
62°
50°
17
65°
50°
18
64°
51°
19
65°
45°
20
64°
42°
21
58°
48°
22
58°
43°
23
59°
49°
24
61°
46°
25
62°
47°
26
58°
49°
27
63°
47°
28
63°
43°
29
61°
42°
30
54°
41°
1
55°
40°
2
54°
38°
3
55°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Thalheim
Thalheim's September 2026 forecast shows daily high temperatures ranging from 54° to 71°, with overnight lows between 38° and 55°. The average high for September is 62° with an average low of 48°. 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 Thalheim. See also: October | November | December.