S
M
T
W
T
F
S
30
77°
61°
31
72°
59°
1
72°
56°
2
74°
50°
3
72°
54°
4
84°
60°
5
70°
45°
6
70°
45°
7
74°
54°
8
77°
56°
9
63°
46°
10
62°
45°
11
62°
48°
12
60°
47°
13
59°
46°
14
60°
46°
15
63°
47°
16
64°
49°
17
65°
46°
18
67°
43°
19
61°
50°
20
66°
49°
21
65°
49°
22
63°
48°
23
67°
49°
24
68°
49°
25
68°
47°
26
67°
42°
27
60°
40°
28
60°
40°
29
61°
41°
30
61°
48°
1
59°
44°
2
59°
42°
3
62°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Leonberg
Leonberg's September 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 40° and 56°. The average high for September is 64° with an average low of 46°. 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 Leonberg. See also: October | November | December.
