S
M
T
W
T
F
S
26
80°
64°
27
75°
63°
28
74°
62°
29
74°
63°
30
77°
64°
31
80°
64°
1
80°
63°
2
77°
62°
3
81°
62°
4
81°
55°
5
74°
56°
6
76°
57°
7
75°
56°
8
72°
57°
9
72°
55°
10
74°
59°
11
76°
63°
12
79°
62°
13
78°
55°
14
74°
55°
15
73°
56°
16
75°
59°
17
73°
57°
18
73°
55°
19
74°
54°
20
74°
54°
21
75°
58°
22
77°
61°
23
80°
62°
24
80°
63°
25
79°
62°
26
81°
60°
27
78°
57°
28
77°
61°
29
78°
58°
30
74°
52°
31
71°
50°
1
68°
52°
2
69°
50°
3
69°
51°
4
70°
51°
5
68°
52°
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 68° to 81°, with overnight lows between 50° and 64°. The average high for August is 75° 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 Centralia. See also: September | October | November.