S
M
T
W
T
F
S
26
74°
56°
27
70°
57°
28
76°
58°
29
75°
57°
30
77°
58°
31
76°
57°
1
75°
55°
2
74°
57°
3
76°
54°
4
76°
58°
5
75°
59°
6
76°
55°
7
77°
52°
8
72°
51°
9
72°
53°
10
75°
55°
11
70°
51°
12
69°
52°
13
70°
54°
14
75°
54°
15
75°
55°
16
70°
56°
17
69°
52°
18
73°
55°
19
74°
48°
20
69°
53°
21
68°
54°
22
73°
50°
23
73°
52°
24
Hist. Avg.
70°
51°
25
Hist. Avg.
70°
51°
26
Hist. Avg.
69°
51°
27
Hist. Avg.
69°
50°
28
Hist. Avg.
69°
50°
29
Hist. Avg.
68°
50°
30
Hist. Avg.
68°
50°
31
Hist. Avg.
68°
49°
1
Hist. Avg.
68°
49°
2
Hist. Avg.
67°
49°
3
Hist. Avg.
67°
49°
4
Hist. Avg.
67°
48°
5
Hist. Avg.
67°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Saint John
Saint John's August 2026 forecast shows daily high temperatures ranging from 68° to 77°, with overnight lows between 48° and 59°. The average high for August is 73° 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.
