S
M
T
W
T
F
S
26
58°
25°
27
51°
26°
28
55°
26°
29
56°
30°
30
53°
34°
1
58°
29°
2
59°
31°
3
63°
32°
4
65°
28°
5
68°
30°
6
56°
29°
7
55°
25°
8
48°
28°
9
54°
36°
10
53°
32°
11
56°
37°
12
58°
27°
13
53°
39°
14
52°
36°
15
43°
36°
16
55°
36°
17
53°
29°
18
53°
35°
19
54°
35°
20
57°
27°
21
62°
38°
22
52°
33°
23
44°
28°
24
52°
33°
25
55°
34°
26
58°
32°
27
55°
35°
28
55°
35°
29
52°
34°
30
54°
30°
31
55°
34°
1
58°
32°
2
62°
34°
3
63°
38°
4
65°
39°
5
66°
48°
6
56°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dease Lake
Dease Lake's May 2026 forecast shows daily high temperatures ranging from 44° to 66°, with overnight lows between 28° and 48°. The average high for May is 57° with an average low of 35°. 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 Dease Lake. See also: June | July | August.