S
M
T
W
T
F
S
30
91°
72°
31
95°
75°
1
97°
70°
2
97°
68°
3
95°
72°
4
95°
72°
5
97°
70°
6
86°
72°
7
87°
67°
8
97°
72°
9
81°
57°
10
82°
59°
11
85°
65°
12
86°
62°
13
77°
60°
14
76°
55°
15
72°
53°
16
78°
54°
17
79°
58°
18
74°
56°
19
72°
53°
20
76°
52°
21
80°
58°
22
79°
57°
23
79°
58°
24
78°
58°
25
79°
58°
26
78°
58°
27
78°
58°
28
77°
57°
29
75°
57°
30
74°
55°
1
75°
49°
2
64°
46°
3
63°
42°
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 97°, with overnight lows between 42° and 72°. The average high for September is 78° with an average low of 57°. 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.
