S
M
T
W
T
F
S
29
77°
30°
30
75°
33°
31
44°
33°
1
47°
31°
2
41°
31°
3
33°
28°
4
49°
29°
5
61°
31°
6
40°
26°
7
61°
19°
8
60°
25°
9
47°
21°
10
63°
18°
11
88°
41°
12
79°
50°
13
75°
42°
14
71°
38°
15
77°
29°
16
82°
38°
17
45°
21°
18
55°
20°
19
60°
22°
20
83°
24°
21
84°
35°
22
94°
38°
23
63°
38°
24
46°
35°
25
43°
29°
26
45°
30°
27
44°
36°
28
52°
34°
29
62°
31°
30
55°
31°
1
60°
37°
2
76°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Ottumwa
Ottumwa's April 2026 forecast shows daily high temperatures ranging from 55° to 76°, with overnight lows between 31° and 44°. The average high for April is 64° 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 Ottumwa. See also: May | June | July.