S
M
T
W
T
F
S
26
54°
24°
27
40°
32°
28
44°
27°
29
37°
29°
30
43°
23°
1
49°
20°
2
57°
20°
3
59°
31°
4
50°
27°
5
38°
24°
6
36°
27°
7
38°
27°
8
53°
22°
9
44°
29°
10
38°
29°
11
53°
31°
12
45°
38°
13
59°
36°
14
68°
35°
15
69°
44°
16
45°
30°
17
56°
37°
18
41°
30°
19
38°
29°
20
52°
34°
21
62°
42°
22
56°
42°
23
62°
46°
24
63°
41°
25
69°
43°
26
72°
49°
27
71°
48°
28
72°
47°
29
75°
48°
30
58°
47°
31
68°
48°
1
63°
49°
2
60°
49°
3
64°
46°
4
68°
48°
5
61°
48°
6
62°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sioux Lookout
Sioux Lookout's May 2026 forecast shows daily high temperatures ranging from 38° to 75°, with overnight lows between 29° and 49°. The average high for May is 61° with an average low of 43°. 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 Sioux Lookout. See also: June | July | August.
