S
M
T
W
T
F
S
30
68°
58°
31
64°
56°
1
66°
54°
2
66°
53°
3
68°
57°
4
N/A
5
67°
48°
6
74°
59°
7
82°
58°
8
64°
51°
9
61°
47°
10
62°
52°
11
62°
52°
12
61°
49°
13
61°
48°
14
62°
51°
15
61°
50°
16
62°
51°
17
60°
47°
18
62°
47°
19
65°
53°
20
62°
52°
21
64°
51°
22
64°
52°
23
65°
52°
24
63°
48°
25
65°
53°
26
64°
52°
27
63°
51°
28
62°
51°
29
61°
50°
30
62°
46°
1
56°
45°
2
55°
44°
3
53°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Simmerath
Simmerath's September 2026 forecast shows daily high temperatures ranging from 53° to 82°, with overnight lows between 43° and 59°. The average high for September is 63° with an average low of 50°. 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 Simmerath. See also: October | November | December.