S
M
T
W
T
F
S
26
82°
51°
27
85°
55°
28
91°
55°
29
91°
54°
30
92°
55°
31
92°
55°
1
93°
54°
2
92°
54°
3
93°
55°
4
89°
51°
5
83°
54°
6
82°
48°
7
84°
50°
8
92°
54°
9
93°
54°
10
93°
53°
11
92°
54°
12
91°
53°
13
89°
51°
14
86°
39°
15
81°
41°
16
82°
46°
17
86°
51°
18
90°
53°
19
92°
47°
20
86°
44°
21
88°
48°
22
89°
52°
23
92°
42°
24
80°
46°
25
84°
45°
26
85°
49°
27
87°
44°
28
87°
47°
29
85°
38°
30
76°
39°
31
78°
43°
1
84°
47°
2
86°
50°
3
87°
46°
4
84°
39°
5
74°
38°
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 74° to 93°, with overnight lows between 38° and 55°. The average high for August is 87° with an average low of 49°. 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.