S
M
T
W
T
F
S
26
66°
56°
27
69°
56°
28
69°
52°
29
65°
52°
30
68°
56°
31
69°
58°
1
71°
57°
2
71°
58°
3
69°
49°
4
67°
51°
5
66°
55°
6
67°
57°
7
71°
54°
8
70°
50°
9
68°
52°
10
66°
56°
11
72°
51°
12
70°
51°
13
66°
52°
14
67°
52°
15
66°
50°
16
66°
49°
17
64°
52°
18
65°
52°
19
68°
50°
20
68°
49°
21
66°
52°
22
66°
50°
23
67°
51°
24
65°
53°
25
68°
49°
26
70°
48°
27
67°
47°
28
62°
52°
29
65°
55°
30
68°
55°
31
70°
54°
1
70°
49°
2
69°
48°
3
64°
49°
4
63°
52°
5
67°
47°
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 62° to 72°, with overnight lows between 47° and 58°. The average high for August is 67° with an average low of 52°. 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.
