S
M
T
W
T
F
S
29
75°
43°
30
84°
64°
31
79°
59°
1
72°
54°
2
77°
55°
3
79°
54°
4
55°
43°
5
61°
39°
6
68°
39°
7
68°
43°
8
78°
50°
9
80°
57°
10
66°
57°
11
79°
63°
12
72°
66°
13
81°
65°
14
79°
52°
15
65°
47°
16
67°
50°
17
73°
57°
18
73°
56°
19
74°
59°
20
77°
58°
21
67°
46°
22
62°
51°
23
70°
53°
24
72°
52°
25
69°
50°
26
66°
51°
27
70°
53°
28
73°
54°
29
72°
55°
30
73°
54°
1
69°
53°
2
64°
49°
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 62° to 81°, with overnight lows between 46° and 66°. The average high for April is 72° with an average low of 54°. 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.
