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
69°
51°
14
71°
51°
15
68°
50°
16
65°
39°
17
73°
53°
18
60°
31°
19
42°
28°
20
49°
34°
21
57°
40°
22
63°
42°
23
58°
41°
24
55°
35°
25
59°
35°
26
58°
34°
27
50°
31°
28
50°
31°
29
56°
30°
30
52°
30°
1
54°
31°
2
51°
33°
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 42° to 73°, with overnight lows between 28° and 53°. The average high for April is 58° with an average low of 38°. 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.
