S
M
T
W
T
F
S
30
79°
56°
31
80°
58°
1
79°
56°
2
79°
55°
3
78°
58°
4
78°
54°
5
71°
54°
6
76°
55°
7
77°
57°
8
76°
56°
9
70°
55°
10
69°
52°
11
68°
49°
12
68°
49°
13
67°
48°
14
67°
48°
15
68°
49°
16
70°
47°
17
72°
46°
18
66°
46°
19
65°
48°
20
66°
47°
21
65°
46°
22
66°
47°
23
66°
48°
24
65°
47°
25
64°
47°
26
63°
45°
27
Hist. Avg.
65°
48°
28
Hist. Avg.
64°
48°
29
Hist. Avg.
64°
48°
30
Hist. Avg.
64°
48°
1
Hist. Avg.
63°
47°
2
Hist. Avg.
63°
47°
3
Hist. Avg.
63°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lahr
Lahr's September 2026 forecast shows daily high temperatures ranging from 63° to 80°, with overnight lows between 45° and 58°. The average high for September is 71° 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 Lahr. See also: October | November | December.