S
M
T
W
T
F
S
26
82°
66°
27
77°
62°
28
76°
60°
29
77°
64°
30
81°
67°
31
83°
66°
1
81°
65°
2
79°
66°
3
84°
59°
4
78°
58°
5
79°
60°
6
78°
59°
7
77°
58°
8
78°
57°
9
77°
56°
10
78°
63°
11
79°
65°
12
82°
64°
13
84°
57°
14
77°
56°
15
78°
59°
16
79°
59°
17
76°
57°
18
76°
57°
19
77°
56°
20
78°
57°
21
80°
62°
22
81°
63°
23
83°
64°
24
84°
64°
25
85°
63°
26
84°
60°
27
82°
61°
28
81°
63°
29
80°
58°
30
80°
54°
31
75°
52°
1
73°
54°
2
73°
53°
3
74°
54°
4
74°
53°
5
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Joseph
St. Joseph's August 2026 forecast shows daily high temperatures ranging from 72° to 85°, with overnight lows between 52° and 67°. The average high for August is 79° with an average low of 60°. 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. Joseph. See also: September | October | November.
