S
M
T
W
T
F
S
29
57°
20°
30
72°
36°
31
80°
58°
1
78°
47°
2
47°
41°
3
63°
41°
4
67°
43°
5
60°
36°
6
52°
35°
7
45°
21°
8
52°
32°
9
63°
45°
10
75°
49°
11
74°
51°
12
72°
50°
13
67°
52°
14
69°
49°
15
66°
43°
16
63°
45°
17
64°
37°
18
55°
42°
19
56°
43°
20
65°
44°
21
65°
44°
22
66°
46°
23
66°
45°
24
68°
44°
25
67°
39°
26
58°
40°
27
56°
36°
28
59°
38°
29
59°
36°
30
57°
36°
1
59°
40°
2
61°
37°
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 45° to 75°, with overnight lows between 21° and 52°. The average high for April is 62° with an average low of 41°. 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.