S
M
T
W
T
F
S
26
91°
72°
27
90°
73°
28
90°
73°
29
91°
72°
30
90°
72°
31
91°
74°
1
90°
73°
2
91°
74°
3
95°
74°
4
94°
73°
5
95°
74°
6
95°
74°
7
94°
73°
8
95°
74°
9
95°
74°
10
94°
73°
11
95°
74°
12
95°
74°
13
94°
73°
14
95°
74°
15
94°
74°
16
94°
73°
17
94°
72°
18
95°
73°
19
95°
73°
20
93°
72°
21
94°
71°
22
92°
72°
23
95°
72°
24
95°
71°
25
94°
69°
26
94°
68°
27
91°
67°
28
90°
67°
29
90°
66°
30
91°
67°
31
93°
70°
1
94°
68°
2
92°
68°
3
93°
69°
4
93°
70°
5
92°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort Johnson
Fort Johnson's August 2026 forecast shows daily high temperatures ranging from 90° to 95°, with overnight lows between 66° and 74°. The average high for August is 93° with an average low of 72°. 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 Johnson. See also: September | October | November.