S
M
T
W
T
F
S
26
63°
55°
27
63°
53°
28
66°
54°
29
59°
51°
30
66°
54°
31
70°
57°
1
66°
51°
2
66°
52°
3
71°
54°
4
72°
56°
5
71°
54°
6
67°
56°
7
68°
54°
8
66°
53°
9
66°
54°
10
68°
54°
11
67°
55°
12
70°
51°
13
74°
55°
14
74°
55°
15
72°
53°
16
67°
52°
17
65°
48°
18
71°
55°
19
73°
55°
20
73°
54°
21
72°
55°
22
73°
56°
23
74°
56°
24
73°
55°
25
72°
54°
26
73°
55°
27
69°
54°
28
68°
54°
29
69°
53°
30
69°
54°
31
72°
55°
1
72°
55°
2
71°
54°
3
72°
54°
4
71°
53°
5
71°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in James Bay
James Bay's August 2026 forecast shows daily high temperatures ranging from 65° to 74°, with overnight lows between 48° and 57°. The average high for August is 70° 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 August weather will actually feel in James Bay. See also: September | October | November.
