S
M
T
W
T
F
S
29
82°
51°
30
83°
67°
31
86°
67°
1
86°
63°
2
83°
68°
3
82°
69°
4
79°
60°
5
68°
51°
6
69°
49°
7
77°
53°
8
76°
54°
9
76°
56°
10
78°
59°
11
79°
58°
12
82°
59°
13
81°
60°
14
82°
60°
15
83°
55°
16
79°
52°
17
80°
57°
18
78°
57°
19
75°
56°
20
76°
57°
21
77°
57°
22
78°
56°
23
80°
57°
24
79°
58°
25
79°
58°
26
80°
57°
27
80°
57°
28
78°
58°
29
80°
59°
30
76°
56°
1
76°
55°
2
77°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Waterloo
Waterloo's April 2026 forecast shows daily high temperatures ranging from 68° to 83°, with overnight lows between 49° and 69°. The average high for April is 78° with an average low of 57°. 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 Waterloo. See also: May | June | July.
