S
M
T
W
T
F
S
29
47°
35°
30
52°
32°
31
59°
35°
1
47°
43°
2
53°
43°
3
52°
45°
4
65°
44°
5
69°
39°
6
65°
38°
7
54°
38°
8
57°
41°
9
63°
43°
10
63°
46°
11
55°
42°
12
51°
41°
13
55°
42°
14
61°
47°
15
62°
49°
16
61°
48°
17
60°
47°
18
59°
47°
19
58°
46°
20
52°
38°
21
53°
40°
22
51°
38°
23
52°
40°
24
53°
40°
25
54°
42°
26
53°
40°
27
55°
40°
28
57°
43°
29
59°
45°
30
56°
45°
1
62°
46°
2
61°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Johnson
Johnson's April 2026 forecast shows daily high temperatures ranging from 51° to 65°, with overnight lows between 38° and 49°. The average high for April is 57° with an average low of 43°. 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 Johnson. See also: May | June | July.