S
M
T
W
T
F
S
26
66°
39°
27
47°
27°
28
47°
28°
29
56°
30°
30
57°
36°
1
60°
34°
2
55°
28°
3
51°
34°
4
61°
39°
5
62°
35°
6
56°
30°
7
51°
31°
8
52°
37°
9
51°
37°
10
54°
35°
11
52°
31°
12
51°
32°
13
57°
37°
14
63°
39°
15
63°
37°
16
54°
34°
17
54°
34°
18
60°
40°
19
56°
38°
20
64°
43°
21
65°
43°
22
67°
45°
23
66°
42°
24
57°
41°
25
62°
43°
26
65°
44°
27
67°
43°
28
69°
38°
29
64°
41°
30
65°
44°
31
66°
43°
1
61°
46°
2
67°
44°
3
68°
46°
4
68°
46°
5
69°
45°
6
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Slave Lake
Slave Lake's May 2026 forecast shows daily high temperatures ranging from 47° to 69°, with overnight lows between 27° and 46°. The average high for May is 60° with an average low of 38°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Slave Lake. See also: June | July | August.
