S
M
T
W
T
F
S
28
67°
50°
29
72°
52°
30
68°
52°
1
68°
54°
2
80°
58°
3
80°
52°
4
78°
50°
5
76°
51°
6
75°
53°
7
80°
52°
8
78°
53°
9
81°
54°
10
80°
52°
11
76°
56°
12
75°
56°
13
70°
55°
14
71°
55°
15
70°
54°
16
71°
52°
17
71°
55°
18
72°
55°
19
74°
56°
20
75°
57°
21
77°
57°
22
77°
58°
23
78°
58°
24
77°
57°
25
78°
57°
26
79°
58°
27
78°
58°
28
77°
57°
29
77°
58°
30
74°
57°
31
74°
56°
1
71°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in St. Martins
St. Martins's July 2026 forecast shows daily high temperatures ranging from 67° to 81°, with overnight lows between 50° and 58°. The average high for July is 75° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in St. Martins. See also: August | September | October.