S
M
T
W
T
F
S
26
78°
58°
27
80°
59°
28
81°
60°
29
80°
60°
30
82°
60°
31
81°
60°
1
80°
59°
2
75°
56°
3
75°
52°
4
76°
56°
5
74°
53°
6
75°
54°
7
77°
58°
8
80°
58°
9
81°
59°
10
81°
59°
11
80°
58°
12
80°
59°
13
81°
58°
14
82°
58°
15
82°
59°
16
79°
60°
17
77°
58°
18
82°
60°
19
80°
56°
20
78°
52°
21
76°
49°
22
74°
50°
23
74°
51°
24
75°
52°
25
74°
50°
26
74°
55°
27
75°
51°
28
73°
49°
29
73°
49°
30
74°
48°
31
72°
47°
1
72°
48°
2
73°
49°
3
71°
49°
4
70°
48°
5
73°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Saint Joseph
Saint Joseph's August 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 47° and 60°. The average high for August is 77° 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 Saint Joseph. See also: September | October | November.
