S
M
T
W
T
F
S
30
77°
52°
31
75°
53°
1
73°
54°
2
75°
55°
3
76°
55°
4
76°
56°
5
75°
58°
6
75°
56°
7
74°
52°
8
75°
54°
9
73°
52°
10
74°
51°
11
74°
55°
12
75°
54°
13
73°
55°
14
67°
52°
15
66°
51°
16
68°
52°
17
71°
54°
18
70°
52°
19
66°
47°
20
65°
46°
21
66°
51°
22
64°
50°
23
Hist. Avg.
63°
49°
24
Hist. Avg.
63°
49°
25
Hist. Avg.
63°
49°
26
Hist. Avg.
63°
49°
27
Hist. Avg.
62°
48°
28
Hist. Avg.
62°
48°
29
Hist. Avg.
62°
48°
30
Hist. Avg.
61°
48°
1
Hist. Avg.
61°
48°
2
Hist. Avg.
61°
47°
3
Hist. Avg.
60°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Saarlouis
Saarlouis's September 2026 forecast shows daily high temperatures ranging from 64° to 77°, with overnight lows between 46° and 58°. The average high for September is 72° with an average low of 53°. 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 Saarlouis. See also: October | November | December.
