S
M
T
W
T
F
S
26
84°
67°
27
78°
63°
28
78°
61°
29
79°
65°
30
81°
67°
31
84°
67°
1
82°
66°
2
79°
66°
3
85°
59°
4
80°
58°
5
79°
61°
6
80°
59°
7
78°
58°
8
79°
59°
9
78°
57°
10
78°
64°
11
80°
65°
12
82°
65°
13
84°
57°
14
78°
57°
15
78°
58°
16
80°
59°
17
77°
58°
18
76°
57°
19
78°
57°
20
80°
58°
21
81°
63°
22
83°
64°
23
84°
65°
24
85°
65°
25
86°
64°
26
85°
62°
27
82°
61°
28
83°
64°
29
82°
58°
30
80°
55°
31
76°
53°
1
73°
55°
2
74°
53°
3
75°
54°
4
75°
53°
5
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Johns
St. Johns's August 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 53° and 67°. The average high for August is 80° with an average low of 60°. 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. Johns. See also: September | October | November.
