S
M
T
W
T
F
S
26
73°
57°
27
74°
58°
28
73°
57°
29
74°
58°
30
75°
59°
31
75°
59°
1
74°
58°
2
75°
58°
3
75°
57°
4
73°
57°
5
74°
56°
6
73°
58°
7
74°
58°
8
72°
57°
9
70°
58°
10
74°
58°
11
74°
57°
12
73°
58°
13
74°
58°
14
75°
57°
15
75°
55°
16
73°
56°
17
74°
58°
18
74°
58°
19
76°
57°
20
73°
56°
21
74°
54°
22
72°
51°
23
72°
50°
24
70°
50°
25
72°
49°
26
72°
48°
27
67°
50°
28
66°
48°
29
65°
48°
30
66°
49°
31
65°
46°
1
64°
46°
2
64°
47°
3
65°
46°
4
66°
49°
5
66°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Saint John
Saint John's August 2026 forecast shows daily high temperatures ranging from 64° to 76°, with overnight lows between 46° and 59°. The average high for August is 72° with an average low of 54°. 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 Saint John. See also: September | October | November.
