S
M
T
W
T
F
S
26
74°
52°
27
74°
47°
28
69°
50°
29
74°
51°
30
75°
50°
31
72°
49°
1
72°
48°
2
70°
48°
3
71°
44°
4
74°
51°
5
76°
53°
6
76°
49°
7
75°
43°
8
70°
43°
9
69°
46°
10
67°
40°
11
65°
47°
12
68°
45°
13
73°
44°
14
74°
49°
15
74°
47°
16
73°
44°
17
72°
43°
18
72°
42°
19
71°
42°
20
67°
43°
21
65°
44°
22
65°
45°
23
64°
40°
24
63°
43°
25
64°
44°
26
63°
42°
27
63°
40°
28
66°
44°
29
70°
47°
30
69°
47°
31
69°
46°
1
63°
42°
2
62°
46°
3
68°
47°
4
68°
45°
5
67°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort St James
Fort St James's August 2026 forecast shows daily high temperatures ranging from 62° to 76°, with overnight lows between 37° and 53°. The average high for August is 69° with an average low of 45°. 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 St James. See also: September | October | November.