S
M
T
W
T
F
S
26
39°
23°
27
45°
20°
28
59°
27°
29
64°
36°
30
65°
39°
1
57°
33°
2
63°
37°
3
59°
39°
4
60°
37°
5
70°
42°
6
64°
40°
7
48°
32°
8
54°
34°
9
60°
37°
10
66°
40°
11
67°
39°
12
61°
36°
13
60°
35°
14
60°
36°
15
61°
38°
16
62°
38°
17
62°
37°
18
62°
38°
19
55°
38°
20
58°
40°
21
66°
44°
22
68°
45°
23
69°
45°
24
69°
46°
25
71°
47°
26
69°
45°
27
70°
46°
28
71°
47°
29
72°
48°
30
71°
48°
31
72°
49°
1
70°
47°
2
61°
46°
3
61°
46°
4
62°
43°
5
68°
42°
6
63°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fort Simpson
Fort Simpson's May 2026 forecast shows daily high temperatures ranging from 48° to 72°, with overnight lows between 32° and 49°. The average high for May is 64° with an average low of 42°. 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 Fort Simpson. See also: June | July | August.
