S
M
T
W
T
F
S
26
95°
76°
27
89°
78°
28
91°
77°
29
96°
77°
30
93°
73°
31
92°
74°
1
91°
77°
2
89°
75°
3
89°
75°
4
88°
74°
5
87°
75°
6
87°
77°
7
88°
76°
8
87°
75°
9
88°
74°
10
90°
76°
11
90°
76°
12
91°
75°
13
89°
75°
14
90°
76°
15
90°
74°
16
91°
75°
17
87°
76°
18
87°
75°
19
89°
76°
20
91°
76°
21
89°
75°
22
87°
76°
23
87°
76°
24
88°
75°
25
89°
76°
26
90°
76°
27
90°
75°
28
89°
76°
29
86°
75°
30
90°
76°
31
89°
76°
1
88°
75°
2
90°
76°
3
87°
75°
4
85°
75°
5
85°
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 85° to 91°, with overnight lows between 74° and 77°. The average high for August is 88° with an average low of 75°. 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.
