S
M
T
W
T
F
S
26
64°
38°
27
57°
52°
28
73°
52°
29
65°
51°
30
78°
44°
31
76°
53°
1
74°
55°
2
72°
44°
3
82°
49°
4
72°
61°
5
69°
54°
6
68°
46°
7
73°
49°
8
76°
52°
9
78°
48°
10
68°
58°
11
67°
55°
12
70°
54°
13
76°
50°
14
77°
49°
15
68°
51°
16
74°
46°
17
83°
52°
18
82°
52°
19
72°
51°
20
75°
49°
21
82°
53°
22
82°
49°
23
79°
56°
24
67°
52°
25
79°
47°
26
82°
58°
27
63°
45°
28
55°
44°
29
66°
40°
30
65°
43°
31
67°
48°
1
64°
46°
2
57°
49°
3
62°
47°
4
62°
35°
5
70°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort Simpson
Fort Simpson's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fort Simpson. See also: September | October | November.
