S
M
T
W
T
F
S
26
89°
63°
27
89°
63°
28
88°
62°
29
89°
63°
30
90°
63°
31
89°
62°
1
81°
59°
2
83°
61°
3
89°
63°
4
89°
63°
5
90°
62°
6
89°
63°
7
81°
53°
8
86°
59°
9
88°
58°
10
84°
59°
11
86°
61°
12
83°
60°
13
85°
61°
14
85°
60°
15
83°
59°
16
79°
59°
17
85°
54°
18
80°
56°
19
85°
56°
20
82°
48°
21
77°
51°
22
77°
58°
23
83°
55°
24
87°
54°
25
79°
48°
26
75°
56°
27
81°
57°
28
83°
57°
29
84°
56°
30
86°
59°
31
85°
58°
1
84°
57°
2
84°
56°
3
83°
56°
4
83°
57°
5
82°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Post Falls
Post Falls's August 2026 forecast shows daily high temperatures ranging from 75° to 90°, with overnight lows between 48° and 63°. The average high for August is 84° with an average low of 58°. 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 Post Falls. See also: September | October | November.
