S
M
T
W
T
F
S
30
87°
64°
31
83°
65°
1
81°
65°
2
82°
66°
3
88°
67°
4
88°
67°
5
84°
66°
6
84°
65°
7
87°
65°
8
84°
61°
9
81°
58°
10
80°
59°
11
80°
59°
12
85°
56°
13
85°
64°
14
84°
59°
15
79°
56°
16
77°
57°
17
78°
56°
18
80°
59°
19
84°
57°
20
84°
60°
21
83°
61°
22
84°
57°
23
82°
54°
24
79°
53°
25
80°
52°
26
79°
59°
27
82°
58°
28
81°
59°
29
82°
57°
30
80°
52°
1
76°
57°
2
80°
58°
3
80°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in La Crosse
La Crosse's September 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 52° and 67°. The average high for September is 82° with an average low of 60°. 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 La Crosse. See also: October | November | December.
