S
M
T
W
T
F
S
26
88°
75°
27
89°
74°
28
88°
75°
29
88°
75°
30
89°
74°
31
89°
75°
1
90°
74°
2
89°
75°
3
88°
75°
4
89°
74°
5
90°
75°
6
89°
75°
7
91°
74°
8
91°
75°
9
90°
75°
10
90°
74°
11
89°
75°
12
89°
75°
13
88°
74°
14
88°
75°
15
89°
75°
16
88°
73°
17
91°
73°
18
92°
74°
19
92°
74°
20
90°
73°
21
89°
72°
22
90°
73°
23
89°
72°
24
89°
72°
25
88°
72°
26
89°
74°
27
89°
72°
28
90°
71°
29
89°
71°
30
91°
72°
31
91°
71°
1
90°
72°
2
90°
72°
3
89°
73°
4
89°
71°
5
91°
72°
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 88° to 92°, with overnight lows between 71° and 75°. The average high for August is 89° with an average low of 74°. 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.
