S
M
T
W
T
F
S
30
37°
9°
31
37°
21°
1
36°
16°
2
36°
10°
3
32°
16°
4
45°
12°
5
48°
23°
6
66°
28°
7
54°
32°
8
55°
37°
9
48°
34°
10
59°
34°
11
52°
34°
12
41°
34°
13
45°
27°
14
55°
25°
15
48°
37°
16
45°
34°
17
46°
27°
18
70°
34°
19
52°
34°
20
43°
27°
21
48°
28°
22
50°
30°
23
52°
32°
24
61°
28°
25
64°
41°
26
54°
36°
27
45°
30°
28
57°
25°
29
54°
37°
30
52°
36°
1
66°
30°
2
73°
37°
3
59°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Slave Lake
Slave Lake's April 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for April is ° with an average low of °. 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 Slave Lake. See also: May | June | July.