S
M
T
W
T
F
S
26
83°
66°
27
79°
64°
28
79°
61°
29
80°
63°
30
81°
67°
31
84°
66°
1
82°
65°
2
81°
66°
3
86°
64°
4
80°
59°
5
81°
61°
6
80°
59°
7
79°
58°
8
80°
59°
9
79°
56°
10
79°
58°
11
81°
65°
12
85°
65°
13
85°
60°
14
83°
57°
15
79°
60°
16
79°
64°
17
80°
57°
18
79°
59°
19
79°
57°
20
80°
57°
21
81°
61°
22
84°
63°
23
84°
63°
24
85°
62°
25
86°
63°
26
85°
61°
27
84°
62°
28
83°
61°
29
84°
61°
30
81°
54°
31
78°
52°
1
76°
52°
2
76°
53°
3
77°
54°
4
76°
53°
5
76°
54°
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 76° to 86°, with overnight lows between 52° and 67°. The average high for August is 81° 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 Saint Joseph. See also: September | October | November.
