S
M
T
W
T
F
S
26
97°
75°
27
97°
78°
28
94°
76°
29
90°
73°
30
82°
71°
31
82°
68°
1
83°
65°
2
85°
61°
3
87°
60°
4
89°
65°
5
78°
70°
6
81°
69°
7
88°
67°
8
89°
67°
9
94°
75°
10
92°
77°
11
94°
76°
12
89°
76°
13
95°
77°
14
88°
73°
15
86°
75°
16
82°
66°
17
84°
61°
18
75°
68°
19
83°
63°
20
85°
62°
21
90°
63°
22
84°
64°
23
77°
58°
24
82°
66°
25
84°
64°
26
88°
63°
27
85°
57°
28
86°
67°
29
92°
72°
30
96°
72°
31
94°
73°
1
94°
73°
2
97°
72°
3
90°
70°
4
89°
67°
5
86°
64°
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 85° to 97°, with overnight lows between 57° and 73°. The average high for August is 91° with an average low of 69°. 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.
