S
M
T
W
T
F
S
29
82°
46°
30
85°
62°
31
83°
63°
1
84°
67°
2
83°
64°
3
81°
69°
4
71°
51°
5
69°
45°
6
71°
47°
7
71°
48°
8
77°
55°
9
80°
61°
10
78°
62°
11
75°
63°
12
78°
67°
13
82°
65°
14
78°
55°
15
68°
54°
16
72°
57°
17
75°
62°
18
81°
63°
19
80°
63°
20
81°
61°
21
76°
51°
22
80°
57°
23
79°
58°
24
80°
58°
25
80°
57°
26
79°
58°
27
78°
58°
28
78°
57°
29
77°
59°
30
76°
60°
1
78°
59°
2
73°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Slidell
Slidell's April 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 51° and 67°. The average high for April is 78° with an average low of 59°. 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 Slidell. See also: May | June | July.
