S
M
T
W
T
F
S
29
77°
44°
30
91°
47°
31
73°
42°
1
49°
39°
2
51°
39°
3
46°
37°
4
51°
35°
5
64°
37°
6
53°
32°
7
51°
47°
8
73°
45°
9
59°
42°
10
61°
47°
11
72°
58°
12
75°
57°
13
77°
46°
14
56°
33°
15
65°
41°
16
61°
39°
17
65°
45°
18
67°
39°
19
70°
45°
20
71°
47°
21
71°
46°
22
70°
42°
23
59°
41°
24
61°
36°
25
64°
48°
26
73°
48°
27
73°
47°
28
72°
48°
29
72°
49°
30
67°
46°
1
70°
49°
2
71°
46°
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 77°, with overnight lows between 32° and 58°. The average high for April is 67° with an average low of 45°. 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.