S
M
T
W
T
F
S
30
92°
58°
31
85°
60°
1
68°
52°
2
69°
55°
3
63°
49°
4
72°
51°
5
79°
54°
6
78°
54°
7
85°
59°
8
92°
56°
9
89°
58°
10
83°
55°
11
82°
54°
12
84°
54°
13
88°
57°
14
87°
56°
15
89°
57°
16
88°
51°
17
89°
54°
18
85°
54°
19
89°
54°
20
89°
53°
21
88°
54°
22
88°
53°
23
82°
53°
24
85°
52°
25
88°
53°
26
89°
54°
27
89°
54°
28
88°
53°
29
87°
53°
30
86°
52°
1
87°
53°
2
85°
52°
3
78°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lucerne
Lucerne's September 2026 forecast shows daily high temperatures ranging from 63° to 92°, with overnight lows between 49° and 59°. The average high for September is 85° with an average low of 54°. 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 Lucerne. See also: October | November | December.
