S
M
T
W
T
F
S
30
78°
58°
31
79°
59°
1
80°
55°
2
81°
57°
3
71°
47°
4
78°
59°
5
76°
58°
6
75°
59°
7
77°
59°
8
78°
55°
9
69°
49°
10
73°
58°
11
79°
58°
12
79°
57°
13
80°
59°
14
80°
58°
15
78°
57°
16
76°
58°
17
77°
57°
18
76°
57°
19
75°
56°
20
76°
56°
21
75°
55°
22
74°
56°
23
73°
54°
24
73°
53°
25
74°
52°
26
73°
52°
27
71°
51°
28
68°
52°
29
73°
52°
30
72°
50°
1
69°
50°
2
66°
37°
3
59°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Marine On Saint Croix
Marine On Saint Croix's September 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 37° and 59°. The average high for September is 75° with an average low of 54°. 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 Marine On Saint Croix. See also: October | November | December.
