S
M
T
W
T
F
S
26
94°
73°
27
93°
75°
28
87°
70°
29
83°
62°
30
84°
57°
31
78°
68°
1
74°
65°
2
81°
59°
3
82°
60°
4
83°
63°
5
85°
67°
6
80°
64°
7
84°
66°
8
86°
69°
9
89°
71°
10
90°
70°
11
83°
68°
12
84°
69°
13
84°
66°
14
85°
63°
15
86°
64°
16
81°
66°
17
91°
69°
18
91°
70°
19
90°
68°
20
89°
67°
21
88°
67°
22
89°
68°
23
89°
67°
24
88°
67°
25
86°
66°
26
88°
66°
27
87°
65°
28
87°
64°
29
88°
65°
30
87°
64°
31
87°
64°
1
88°
65°
2
87°
65°
3
87°
64°
4
86°
63°
5
87°
64°
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 80° to 91°, with overnight lows between 59° and 71°. The average high for August is 86° with an average low of 66°. 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.
