S
M
T
W
T
F
S
29
45°
36°
30
49°
36°
31
53°
41°
1
49°
44°
2
49°
44°
3
51°
46°
4
56°
45°
5
60°
49°
6
57°
47°
7
54°
46°
8
57°
42°
9
57°
44°
10
59°
45°
11
52°
47°
12
50°
47°
13
49°
46°
14
47°
44°
15
46°
40°
16
50°
40°
17
54°
44°
18
55°
43°
19
64°
47°
20
69°
49°
21
57°
49°
22
55°
48°
23
52°
47°
24
62°
45°
25
63°
44°
26
64°
44°
27
59°
44°
28
57°
43°
29
62°
48°
30
64°
47°
1
60°
49°
2
58°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in James Bay
James Bay's April 2026 forecast shows daily high temperatures ranging from 57° to 64°, with overnight lows between 43° and 49°. The average high for April is 61° 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 April weather will actually feel in James Bay. See also: May | June | July.