S
M
T
W
T
F
S
30
81°
66°
31
86°
70°
1
90°
67°
2
87°
69°
3
87°
70°
4
86°
70°
5
89°
68°
6
85°
61°
7
78°
62°
8
77°
61°
9
76°
59°
10
77°
57°
11
72°
53°
12
71°
52°
13
71°
55°
14
73°
48°
15
78°
54°
16
77°
51°
17
75°
53°
18
77°
54°
19
75°
52°
20
75°
52°
21
76°
54°
22
77°
54°
23
77°
53°
24
76°
52°
25
76°
52°
26
75°
50°
27
76°
51°
28
76°
50°
29
75°
49°
30
74°
50°
1
74°
50°
2
73°
49°
3
73°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lanesboro
Lanesboro's September 2026 forecast shows daily high temperatures ranging from 71° to 90°, with overnight lows between 48° and 70°. The average high for September is 77° with an average low of 55°. 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 Lanesboro. See also: October | November | December.