S
M
T
W
T
F
S
29
82°
49°
30
82°
49°
31
62°
38°
1
55°
36°
2
73°
31°
3
56°
36°
4
63°
31°
5
71°
34°
6
69°
34°
7
73°
40°
8
76°
39°
9
70°
38°
10
66°
40°
11
68°
41°
12
67°
40°
13
71°
39°
14
70°
39°
15
67°
38°
16
68°
40°
17
66°
33°
18
69°
38°
19
68°
37°
20
69°
30°
21
56°
28°
22
56°
28°
23
61°
35°
24
62°
38°
25
72°
39°
26
71°
40°
27
69°
41°
28
67°
42°
29
62°
42°
30
64°
41°
1
62°
42°
2
64°
40°
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 56° to 76°, with overnight lows between 28° and 42°. The average high for April is 67° with an average low of 37°. 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.
