S
M
T
W
T
F
S
29
57°
29°
30
71°
31°
31
44°
34°
1
41°
26°
2
51°
26°
3
56°
33°
4
46°
33°
5
39°
27°
6
45°
20°
7
36°
18°
8
54°
25°
9
55°
40°
10
44°
28°
11
54°
23°
12
60°
37°
13
72°
50°
14
74°
47°
15
69°
54°
16
66°
45°
17
71°
38°
18
62°
37°
19
42°
26°
20
45°
23°
21
66°
37°
22
72°
38°
23
78°
39°
24
75°
47°
25
52°
40°
26
64°
34°
27
68°
41°
28
58°
40°
29
52°
32°
30
47°
30°
1
45°
29°
2
49°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in St. Helen
St. Helen's April 2026 forecast shows daily high temperatures ranging from 45° to 58°, with overnight lows between 29° and 40°. The average high for April is 50° with an average low of 33°. 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 St. Helen. See also: May | June | July.
