S
M
T
W
T
F
S
29
43°
32°
30
43°
32°
31
43°
32°
1
45°
32°
2
52°
30°
3
57°
32°
4
63°
46°
5
72°
43°
6
68°
46°
7
73°
43°
8
70°
41°
9
67°
46°
10
60°
41°
11
69°
45°
12
50°
39°
13
47°
37°
14
45°
36°
15
46°
36°
16
53°
40°
17
57°
42°
18
58°
42°
19
58°
42°
20
57°
43°
21
48°
35°
22
48°
36°
23
49°
37°
24
48°
35°
25
49°
35°
26
48°
34°
27
50°
36°
28
57°
41°
29
57°
38°
30
59°
43°
1
58°
39°
2
56°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Wil SG
Wil SG's April 2026 forecast shows daily high temperatures ranging from 45° to 70°, with overnight lows between 34° and 46°. The average high for April is 55° with an average low of 39°. 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 Wil SG. See also: May | June | July.
