S
M
T
W
T
F
S
30
66°
49°
31
66°
49°
1
65°
48°
2
65°
45°
3
66°
46°
4
64°
50°
5
65°
50°
6
63°
51°
7
63°
48°
8
64°
46°
9
63°
47°
10
65°
52°
11
64°
53°
12
69°
52°
13
68°
50°
14
62°
48°
15
63°
49°
16
67°
51°
17
Hist. Avg.
62°
47°
18
Hist. Avg.
61°
47°
19
Hist. Avg.
61°
46°
20
Hist. Avg.
61°
46°
21
Hist. Avg.
60°
46°
22
Hist. Avg.
60°
46°
23
Hist. Avg.
59°
45°
24
Hist. Avg.
59°
45°
25
Hist. Avg.
59°
45°
26
Hist. Avg.
58°
44°
27
Hist. Avg.
58°
44°
28
Hist. Avg.
57°
44°
29
Hist. Avg.
57°
43°
30
Hist. Avg.
57°
43°
1
Hist. Avg.
56°
43°
2
Hist. Avg.
56°
42°
3
Hist. Avg.
55°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Ilmenau
Ilmenau's September 2026 forecast shows daily high temperatures ranging from 62° to 69°, with overnight lows between 45° and 53°. The average high for September is 65° 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 Ilmenau. See also: October | November | December.
