S
M
T
W
T
F
S
26
94°
75°
27
95°
76°
28
95°
77°
29
95°
77°
30
96°
77°
31
95°
77°
1
95°
77°
2
87°
68°
3
89°
67°
4
94°
68°
5
96°
68°
6
89°
73°
7
92°
72°
8
93°
72°
9
93°
71°
10
94°
73°
11
93°
73°
12
95°
75°
13
95°
78°
14
96°
76°
15
97°
76°
16
98°
76°
17
99°
77°
18
98°
77°
19
95°
78°
20
97°
78°
21
98°
72°
22
97°
72°
23
98°
74°
24
85°
73°
25
91°
75°
26
93°
74°
27
92°
72°
28
91°
72°
29
96°
70°
30
95°
72°
31
97°
71°
1
97°
71°
2
94°
72°
3
93°
70°
4
94°
68°
5
92°
67°
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 67° and 75°. The average high for August is 93° with an average low of 71°. 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.
