S
M
T
W
T
F
S
30
71°
59°
31
71°
61°
1
72°
65°
2
75°
66°
3
77°
66°
4
78°
65°
5
79°
65°
6
77°
64°
7
73°
64°
8
70°
61°
9
73°
63°
10
74°
63°
11
76°
62°
12
77°
63°
13
78°
64°
14
77°
63°
15
74°
62°
16
71°
62°
17
70°
61°
18
74°
61°
19
74°
62°
20
73°
62°
21
75°
57°
22
75°
58°
23
76°
49°
24
72°
51°
25
72°
48°
26
68°
57°
27
68°
59°
28
73°
61°
29
75°
57°
30
72°
46°
1
70°
43°
2
64°
51°
3
65°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in La Crescent
La Crescent's September 2026 forecast shows daily high temperatures ranging from 64° to 79°, with overnight lows between 43° and 66°. The average high for September is 73° with an average low of 59°. 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 Crescent. See also: October | November | December.