S
M
T
W
T
F
S
29
75°
36°
30
75°
57°
31
81°
66°
1
N/A
2
83°
67°
3
83°
66°
4
77°
50°
5
67°
44°
6
67°
38°
7
68°
39°
8
74°
47°
9
73°
49°
10
76°
50°
11
74°
49°
12
72°
51°
13
76°
52°
14
71°
44°
15
75°
51°
16
76°
50°
17
75°
50°
18
66°
49°
19
76°
51°
20
76°
52°
21
75°
52°
22
77°
51°
23
77°
53°
24
78°
53°
25
78°
54°
26
77°
49°
27
73°
44°
28
68°
47°
29
76°
51°
30
69°
46°
1
69°
49°
2
70°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Waterloo
Waterloo's April 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 38° and 67°. The average high for April is 74° with an average low of 50°. 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.
