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
67°
37°
6
66°
41°
7
47°
31°
8
54°
34°
9
60°
37°
10
63°
40°
11
63°
39°
12
55°
36°
13
55°
34°
14
60°
36°
15
60°
38°
16
62°
38°
17
60°
37°
18
63°
37°
19
62°
38°
20
66°
43°
21
59°
36°
22
64°
44°
23
61°
40°
24
68°
47°
25
71°
46°
26
65°
44°
27
59°
43°
28
59°
38°
29
60°
40°
30
69°
46°
31
70°
47°
1
64°
43°
2
68°
42°
3
61°
40°
4
59°
39°
5
61°
39°
6
67°
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 47° to 71°, with overnight lows between 31° and 47°. The average high for May is 62° with an average low of 40°. 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.
