S
M
T
W
T
F
S
26
85°
49°
27
88°
48°
28
88°
47°
29
85°
45°
30
87°
39°
31
94°
45°
1
88°
49°
2
70°
45°
3
78°
35°
4
84°
39°
5
89°
40°
6
93°
45°
7
95°
46°
8
79°
49°
9
86°
43°
10
87°
44°
11
87°
44°
12
86°
46°
13
79°
54°
14
82°
49°
15
85°
55°
16
88°
51°
17
92°
53°
18
91°
55°
19
88°
49°
20
94°
43°
21
99°
47°
22
89°
55°
23
81°
51°
24
88°
55°
25
95°
58°
26
95°
53°
27
83°
45°
28
81°
45°
29
79°
44°
30
78°
43°
31
78°
44°
1
81°
47°
2
80°
46°
3
83°
47°
4
80°
43°
5
83°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Chewelah
Chewelah's August 2026 forecast shows daily high temperatures ranging from 78° to 95°, with overnight lows between 43° and 58°. The average high for August is 84° with an average low of 48°. 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 Chewelah. See also: September | October | November.