S
M
T
W
T
F
S
26
69°
52°
27
63°
52°
28
61°
54°
29
65°
55°
30
64°
54°
31
67°
54°
1
70°
55°
2
66°
56°
3
72°
57°
4
74°
58°
5
70°
57°
6
71°
59°
7
73°
57°
8
71°
57°
9
71°
56°
10
66°
56°
11
66°
56°
12
67°
55°
13
67°
56°
14
68°
57°
15
71°
56°
16
70°
55°
17
66°
54°
18
69°
54°
19
64°
56°
20
65°
56°
21
66°
55°
22
67°
54°
23
65°
55°
24
64°
55°
25
68°
54°
26
69°
54°
27
66°
55°
28
65°
55°
29
68°
54°
30
66°
55°
31
68°
54°
1
65°
54°
2
66°
53°
3
64°
53°
4
62°
52°
5
61°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. John's
St. John's's August 2026 forecast shows daily high temperatures ranging from 61° to 74°, with overnight lows between 51° and 59°. The average high for August is 67° with an average low of 55°. 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. John's. See also: September | October | November.
