S
M
T
W
T
F
S
29
52°
39°
30
50°
39°
31
55°
46°
1
52°
30°
2
48°
28°
3
48°
37°
4
48°
36°
5
46°
34°
6
55°
32°
7
68°
34°
8
57°
46°
9
49°
35°
10
50°
38°
11
50°
43°
12
51°
37°
13
53°
35°
14
55°
41°
15
53°
42°
16
56°
45°
17
55°
44°
18
58°
42°
19
56°
42°
20
58°
42°
21
57°
40°
22
50°
36°
23
51°
36°
24
50°
38°
25
50°
38°
26
51°
37°
27
51°
37°
28
52°
38°
29
52°
42°
30
53°
42°
1
52°
41°
2
52°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Johnstone
Johnstone's April 2026 forecast shows daily high temperatures ranging from 49° to 58°, with overnight lows between 35° and 45°. The average high for April is 53° with an average low of 40°. 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 Johnstone. See also: May | June | July.
