S
M
T
W
T
F
S
30
82°
66°
31
89°
65°
1
88°
60°
2
87°
65°
3
86°
68°
4
86°
66°
5
85°
66°
6
83°
66°
7
84°
65°
8
83°
65°
9
81°
56°
10
80°
55°
11
86°
58°
12
74°
49°
13
71°
44°
14
63°
42°
15
72°
47°
16
75°
44°
17
70°
58°
18
63°
58°
19
63°
57°
20
68°
51°
21
61°
47°
22
66°
40°
23
N/A
24
N/A
25
N/A
26
66°
56°
27
N/A
28
73°
61°
29
69°
62°
30
72°
64°
1
68°
39°
2
63°
46°
3
65°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in St. Croix Falls
St. Croix Falls's September 2026 forecast shows daily high temperatures ranging from 63° to 68°, with overnight lows between 39° and 46°. The average high for September is 65° with an average low of 44°. 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 St. Croix Falls. See also: October | November | December.
