S
M
T
W
T
F
S
26
99°
77°
27
99°
79°
28
90°
73°
29
82°
73°
30
86°
72°
31
82°
64°
1
82°
61°
2
82°
59°
3
88°
63°
4
84°
64°
5
70°
63°
6
79°
68°
7
90°
68°
8
88°
70°
9
95°
75°
10
91°
73°
11
93°
77°
12
86°
75°
13
91°
73°
14
82°
72°
15
88°
73°
16
82°
63°
17
84°
61°
18
84°
66°
19
84°
63°
20
84°
63°
21
90°
64°
22
82°
63°
23
73°
61°
24
82°
63°
25
84°
64°
26
88°
63°
27
84°
59°
28
86°
63°
29
95°
68°
30
97°
79°
31
99°
73°
1
99°
76°
2
100°
77°
3
99°
75°
4
96°
75°
5
99°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Centralia
Centralia's August 2026 forecast shows daily high temperatures ranging from 96° to 100°, with overnight lows between 73° and 77°. The average high for August is 99° with an average low of 75°. 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 Centralia. See also: September | October | November.