S
M
T
W
T
F
S
26
88°
69°
27
89°
68°
28
89°
70°
29
88°
70°
30
89°
69°
31
88°
67°
1
85°
69°
2
88°
68°
3
88°
69°
4
90°
70°
5
90°
69°
6
89°
70°
7
86°
66°
8
89°
68°
9
88°
66°
10
89°
60°
11
82°
63°
12
83°
62°
13
86°
61°
14
86°
62°
15
83°
64°
16
81°
67°
17
83°
66°
18
83°
64°
19
82°
64°
20
81°
63°
21
81°
66°
22
82°
65°
23
81°
61°
24
83°
65°
25
87°
59°
26
87°
58°
27
81°
59°
28
80°
61°
29
80°
63°
30
79°
62°
31
83°
63°
1
82°
57°
2
79°
56°
3
79°
56°
4
80°
55°
5
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. James
St. James's August 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 55° and 70°. The average high for August is 84° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in St. James. See also: September | October | November.
