S
M
T
W
T
F
S
30
76°
59°
31
78°
60°
1
73°
55°
2
78°
61°
3
82°
59°
4
83°
55°
5
77°
50°
6
76°
50°
7
77°
58°
8
79°
54°
9
80°
48°
10
71°
47°
11
69°
47°
12
69°
48°
13
71°
52°
14
70°
45°
15
68°
43°
16
66°
44°
17
67°
43°
18
66°
44°
19
67°
44°
20
67°
45°
21
68°
48°
22
71°
53°
23
72°
44°
24
75°
53°
25
72°
50°
26
73°
41°
27
64°
49°
28
64°
50°
29
65°
48°
30
66°
47°
1
65°
43°
2
60°
41°
3
61°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Croix Falls
St. Croix Falls's September 2026 forecast shows daily high temperatures ranging from 60° to 83°, with overnight lows between 41° and 61°. The average high for September is 71° with an average low of 49°. 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.
