S
M
T
W
T
F
S
26
98°
77°
27
94°
80°
28
98°
78°
29
100°
79°
30
90°
76°
31
92°
75°
1
89°
76°
2
84°
75°
3
87°
74°
4
87°
76°
5
92°
74°
6
89°
75°
7
87°
74°
8
89°
75°
9
90°
76°
10
93°
75°
11
94°
77°
12
93°
76°
13
93°
75°
14
94°
77°
15
86°
76°
16
87°
75°
17
88°
77°
18
89°
75°
19
92°
77°
20
92°
78°
21
91°
77°
22
88°
77°
23
89°
76°
24
89°
77°
25
92°
77°
26
92°
76°
27
91°
77°
28
91°
77°
29
87°
76°
30
91°
77°
31
91°
77°
1
90°
76°
2
91°
77°
3
90°
76°
4
86°
76°
5
86°
76°
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 94°, with overnight lows between 74° and 78°. The average high for August is 90° with an average low of 76°. 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.
