S
M
T
W
T
F
S
26
89°
73°
27
90°
73°
28
91°
73°
29
92°
74°
30
91°
73°
31
90°
72°
1
89°
73°
2
91°
72°
3
90°
74°
4
91°
73°
5
89°
74°
6
89°
74°
7
90°
73°
8
89°
73°
9
90°
74°
10
89°
73°
11
90°
73°
12
89°
74°
13
89°
73°
14
90°
73°
15
90°
74°
16
91°
73°
17
91°
73°
18
90°
74°
19
90°
71°
20
89°
73°
21
91°
74°
22
91°
73°
23
90°
74°
24
88°
73°
25
89°
74°
26
88°
72°
27
88°
73°
28
89°
74°
29
90°
74°
30
87°
73°
31
87°
74°
1
88°
72°
2
88°
72°
3
87°
73°
4
88°
72°
5
88°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Augustine
St. Augustine's August 2026 forecast shows daily high temperatures ranging from 87° to 92°, with overnight lows between 71° and 74°. The average high for August is 89° with an average low of 73°. 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 St. Augustine. See also: September | October | November.
