S
M
T
W
T
F
S
29
27°
-11°
30
27°
14°
31
30°
5°
1
37°
5°
2
39°
28°
3
45°
19°
4
36°
28°
5
37°
28°
6
34°
21°
7
36°
27°
8
37°
28°
9
43°
23°
10
45°
28°
11
48°
32°
12
36°
27°
13
50°
25°
14
43°
27°
15
31°
8°
16
41°
21°
17
42°
23°
18
49°
27°
19
52°
36°
20
53°
34°
21
58°
35°
22
48°
34°
23
44°
30°
24
47°
30°
25
50°
31°
26
49°
33°
27
49°
35°
28
66°
43°
29
57°
34°
30
48°
32°
1
48°
28°
2
49°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Slave Lake
Slave Lake's April 2026 forecast shows daily high temperatures ranging from 31° to 66°, with overnight lows between 8° and 43°. The average high for April is 49° with an average low of 30°. 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.
