S
M
T
W
T
F
S
26
82°
69°
27
90°
72°
28
79°
62°
29
82°
58°
30
84°
60°
31
80°
64°
1
71°
65°
2
79°
65°
3
82°
62°
4
84°
62°
5
82°
64°
6
78°
67°
7
85°
65°
8
84°
67°
9
87°
66°
10
87°
74°
11
83°
68°
12
77°
68°
13
82°
66°
14
80°
69°
15
81°
71°
16
86°
73°
17
79°
63°
18
79°
61°
19
82°
66°
20
81°
64°
21
80°
57°
22
79°
61°
23
77°
57°
24
77°
54°
25
77°
57°
26
83°
64°
27
80°
62°
28
82°
59°
29
80°
60°
30
84°
64°
31
90°
65°
1
92°
72°
2
93°
71°
3
93°
73°
4
95°
72°
5
92°
71°
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 ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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.
