S
M
T
W
T
F
S
29
64°
37°
30
81°
43°
31
70°
39°
1
43°
34°
2
66°
34°
3
52°
37°
4
46°
37°
5
54°
34°
6
52°
32°
7
43°
31°
8
68°
44°
9
59°
39°
10
55°
32°
11
59°
49°
12
74°
59°
13
74°
46°
14
57°
37°
15
51°
33°
16
55°
42°
17
61°
44°
18
62°
42°
19
57°
43°
20
59°
37°
21
61°
44°
22
60°
44°
23
65°
41°
24
61°
37°
25
59°
44°
26
55°
43°
27
58°
43°
28
66°
40°
29
57°
38°
30
62°
44°
1
64°
42°
2
58°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Johnstown
Johnstown's April 2026 forecast shows daily high temperatures ranging from 43° to 74°, with overnight lows between 31° and 59°. The average high for April is 60° 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 Johnstown. See also: May | June | July.
