S
M
T
W
T
F
S
29
79°
51°
30
81°
51°
31
58°
37°
1
55°
36°
2
71°
32°
3
54°
28°
4
59°
24°
5
67°
31°
6
66°
34°
7
72°
25°
8
68°
42°
9
73°
38°
10
63°
31°
11
77°
44°
12
76°
38°
13
73°
46°
14
61°
38°
15
67°
37°
16
77°
40°
17
41°
22°
18
56°
26°
19
71°
30°
20
78°
38°
21
87°
49°
22
86°
43°
23
66°
39°
24
65°
39°
25
65°
42°
26
56°
34°
27
57°
37°
28
65°
40°
29
66°
38°
30
59°
36°
1
65°
37°
2
70°
39°
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 56° to 87°, with overnight lows between 34° and 49°. The average high for April is 67° with an average low of 39°. 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.