S
M
T
W
T
F
S
29
47°
28°
30
63°
40°
31
52°
38°
1
42°
34°
2
46°
31°
3
74°
43°
4
60°
38°
5
59°
36°
6
39°
28°
7
32°
19°
8
46°
35°
9
63°
46°
10
50°
36°
11
49°
30°
12
57°
50°
13
66°
53°
14
63°
42°
15
48°
34°
16
53°
43°
17
55°
42°
18
58°
42°
19
62°
46°
20
65°
52°
21
64°
47°
22
51°
39°
23
50°
37°
24
53°
42°
25
56°
43°
26
55°
42°
27
52°
39°
28
56°
38°
29
55°
39°
30
61°
45°
1
58°
45°
2
63°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Black River
Black River's April 2026 forecast shows daily high temperatures ranging from 46° to 66°, with overnight lows between 30° and 53°. The average high for April is 56° with an average low of 42°. 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 Black River. See also: May | June | July.