S
M
T
W
T
F
S
29
68°
37°
30
79°
43°
31
68°
45°
1
48°
34°
2
41°
32°
3
41°
36°
4
41°
34°
5
54°
32°
6
43°
30°
7
46°
38°
8
65°
31°
9
52°
36°
10
55°
33°
11
58°
53°
12
74°
60°
13
80°
46°
14
55°
35°
15
48°
32°
16
56°
42°
17
60°
42°
18
61°
43°
19
60°
47°
20
64°
39°
21
63°
45°
22
63°
44°
23
68°
41°
24
58°
35°
25
65°
46°
26
62°
46°
27
70°
47°
28
70°
42°
29
66°
43°
30
68°
45°
1
70°
48°
2
68°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Decorah
Decorah's April 2026 forecast shows daily high temperatures ranging from 46° to 80°, with overnight lows between 31° and 60°. The average high for April is 63° with an average low of 42°. 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 Decorah. See also: May | June | July.
