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
N/A
9
40°
25°
10
47°
27°
11
44°
27°
12
34°
24°
13
40°
28°
14
43°
30°
15
31°
21°
16
32°
15°
17
40°
22°
18
41°
24°
19
39°
26°
20
43°
24°
21
52°
35°
22
45°
27°
23
43°
26°
24
43°
26°
25
44°
28°
26
46°
24°
27
46°
26°
28
47°
31°
29
48°
31°
30
48°
28°
1
53°
34°
2
53°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Slave Lake
Slave Lake's April 2026 forecast shows daily high temperatures ranging from 31° to 53°, with overnight lows between 15° and 35°. The average high for April is 43° with an average low of 27°. 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.
