S
M
T
W
T
F
S
26
71°
55°
27
72°
52°
28
69°
53°
29
69°
53°
30
70°
54°
31
72°
53°
1
71°
50°
2
69°
52°
3
66°
55°
4
73°
51°
5
73°
51°
6
67°
56°
7
68°
53°
8
71°
51°
9
69°
52°
10
68°
52°
11
70°
53°
12
66°
56°
13
69°
52°
14
71°
49°
15
66°
49°
16
65°
52°
17
65°
49°
18
70°
48°
19
65°
49°
20
64°
48°
21
65°
49°
22
65°
52°
23
66°
54°
24
66°
54°
25
68°
52°
26
67°
55°
27
68°
54°
28
70°
51°
29
70°
49°
30
66°
51°
31
65°
53°
1
66°
51°
2
66°
50°
3
68°
48°
4
64°
49°
5
64°
52°
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 64° to 73°, with overnight lows between 48° and 56°. The average high for August is 68° 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.
