S
M
T
W
T
F
S
26
94°
76°
27
96°
81°
28
91°
75°
29
96°
81°
30
92°
78°
31
91°
78°
1
85°
76°
2
85°
78°
3
89°
77°
4
89°
78°
5
90°
75°
6
89°
74°
7
87°
75°
8
88°
76°
9
87°
74°
10
88°
76°
11
85°
76°
12
87°
76°
13
89°
75°
14
88°
76°
15
87°
75°
16
84°
72°
17
86°
77°
18
87°
77°
19
89°
78°
20
89°
78°
21
88°
77°
22
85°
77°
23
86°
76°
24
86°
77°
25
87°
77°
26
88°
76°
27
88°
77°
28
87°
77°
29
86°
76°
30
88°
77°
31
87°
76°
1
86°
77°
2
88°
77°
3
86°
76°
4
84°
76°
5
84°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Port St. Joe
Port St. Joe's August 2026 forecast shows daily high temperatures ranging from 84° to 90°, with overnight lows between 72° and 78°. The average high for August is 87° with an average low of 76°. 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 Port St. Joe. See also: September | October | November.
