S
M
T
W
T
F
S
30
75°
52°
31
75°
47°
1
74°
44°
2
67°
46°
3
68°
46°
4
68°
45°
5
67°
45°
6
66°
46°
7
69°
45°
8
71°
44°
9
69°
45°
10
70°
50°
11
69°
50°
12
68°
49°
13
69°
44°
14
70°
43°
15
68°
46°
16
68°
45°
17
63°
46°
18
63°
44°
19
61°
43°
20
61°
46°
21
Hist. Avg.
62°
44°
22
Hist. Avg.
62°
44°
23
Hist. Avg.
61°
44°
24
Hist. Avg.
61°
43°
25
Hist. Avg.
61°
43°
26
Hist. Avg.
60°
43°
27
Hist. Avg.
60°
42°
28
Hist. Avg.
60°
42°
29
Hist. Avg.
59°
42°
30
Hist. Avg.
59°
42°
1
Hist. Avg.
58°
41°
2
Hist. Avg.
58°
41°
3
Hist. Avg.
58°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in St. Martins
St. Martins's September 2026 forecast shows daily high temperatures ranging from 61° to 75°, with overnight lows between 43° and 52°. The average high for September is 68° with an average low of 46°. 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. Martins. See also: October | November | December.
