S
M
T
W
T
F
S
26
91°
73°
27
90°
74°
28
92°
73°
29
89°
74°
30
89°
73°
31
90°
73°
1
89°
74°
2
89°
73°
3
90°
73°
4
90°
74°
5
92°
73°
6
92°
73°
7
89°
74°
8
89°
73°
9
90°
73°
10
91°
74°
11
90°
73°
12
90°
73°
13
92°
74°
14
90°
74°
15
89°
73°
16
90°
74°
17
91°
73°
18
88°
72°
19
89°
72°
20
90°
73°
21
90°
72°
22
89°
75°
23
91°
74°
24
88°
75°
25
87°
75°
26
88°
74°
27
88°
75°
28
87°
73°
29
90°
71°
30
90°
72°
31
89°
72°
1
88°
73°
2
88°
72°
3
89°
73°
4
88°
72°
5
87°
73°
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 75°. 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.
