S
M
T
W
T
F
S
28
77°
69°
29
90°
69°
30
92°
68°
1
100°
72°
2
102°
77°
3
101°
78°
4
100°
73°
5
94°
70°
6
86°
71°
7
82°
71°
8
82°
72°
9
88°
72°
10
87°
69°
11
89°
67°
12
85°
64°
13
85°
65°
14
92°
70°
15
99°
71°
16
96°
69°
17
92°
68°
18
86°
68°
19
87°
67°
20
85°
63°
21
83°
65°
22
84°
65°
23
86°
67°
24
85°
66°
25
89°
68°
26
88°
69°
27
85°
65°
28
86°
67°
29
86°
63°
30
82°
68°
31
83°
69°
1
85°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in St. James
St. James's July 2026 forecast shows daily high temperatures ranging from 82° to 99°, with overnight lows between 63° and 71°. The average high for July is 87° with an average low of 67°. 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. James. See also: August | September | October.