S
M
T
W
T
F
S
29
68°
40°
30
84°
59°
31
83°
54°
1
54°
43°
2
74°
48°
3
80°
54°
4
72°
40°
5
57°
38°
6
59°
40°
7
47°
35°
8
75°
44°
9
81°
57°
10
67°
44°
11
69°
39°
12
82°
62°
13
84°
66°
14
87°
62°
15
74°
63°
16
82°
60°
17
85°
59°
18
61°
39°
19
63°
36°
20
62°
32°
21
82°
60°
22
79°
58°
23
82°
63°
24
75°
50°
25
73°
51°
26
75°
59°
27
72°
47°
28
64°
45°
29
63°
46°
30
62°
42°
1
65°
45°
2
63°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Mason City
Mason City's April 2026 forecast shows daily high temperatures ranging from 62° to 82°, with overnight lows between 42° and 63°. The average high for April is 71° with an average low of 51°. 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 Mason City. See also: May | June | July.