S
M
T
W
T
F
S
30
89°
73°
31
90°
74°
1
89°
73°
2
87°
73°
3
89°
74°
4
88°
75°
5
89°
71°
6
88°
73°
7
88°
73°
8
87°
73°
9
Hist. Avg.
88°
74°
10
Hist. Avg.
88°
74°
11
Hist. Avg.
88°
74°
12
Hist. Avg.
88°
74°
13
Hist. Avg.
88°
74°
14
Hist. Avg.
88°
74°
15
Hist. Avg.
88°
73°
16
Hist. Avg.
88°
73°
17
Hist. Avg.
87°
73°
18
Hist. Avg.
87°
73°
19
Hist. Avg.
87°
73°
20
Hist. Avg.
87°
73°
21
Hist. Avg.
87°
73°
22
Hist. Avg.
87°
73°
23
Hist. Avg.
87°
72°
24
Hist. Avg.
86°
72°
25
Hist. Avg.
86°
72°
26
Hist. Avg.
86°
72°
27
Hist. Avg.
86°
72°
28
Hist. Avg.
86°
72°
29
Hist. Avg.
86°
71°
30
Hist. Avg.
85°
71°
1
Hist. Avg.
85°
71°
2
Hist. Avg.
85°
71°
3
Hist. Avg.
85°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in St. Augustine
St. Augustine's September 2026 forecast shows daily high temperatures ranging from 87° to 90°, with overnight lows between 71° and 75°. The average high for September is 88° 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 September weather will actually feel in St. Augustine. See also: October | November | December.
