S
M
T
W
T
F
S
26
85°
72°
27
88°
72°
28
89°
71°
29
88°
72°
30
89°
73°
31
91°
74°
1
90°
73°
2
91°
71°
3
89°
74°
4
88°
70°
5
87°
70°
6
86°
71°
7
86°
70°
8
85°
71°
9
86°
70°
10
86°
74°
11
87°
73°
12
88°
72°
13
88°
73°
14
91°
73°
15
90°
72°
16
88°
71°
17
89°
73°
18
90°
72°
19
88°
70°
20
85°
69°
21
86°
70°
22
87°
73°
23
88°
73°
24
89°
72°
25
89°
73°
26
88°
73°
27
88°
72°
28
87°
72°
29
88°
71°
30
85°
68°
31
88°
67°
1
84°
69°
2
85°
68°
3
84°
70°
4
87°
71°
5
88°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Jacksonville
Jacksonville's August 2026 forecast shows daily high temperatures ranging from 84° to 91°, with overnight lows between 67° and 74°. The average high for August is 88° with an average low of 71°. 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 Jacksonville. See also: September | October | November.
