S
M
T
W
T
F
S
26
91°
72°
27
92°
72°
28
93°
71°
29
93°
72°
30
92°
71°
31
91°
70°
1
90°
71°
2
92°
72°
3
92°
71°
4
93°
72°
5
92°
71°
6
92°
72°
7
88°
64°
8
89°
67°
9
89°
62°
10
86°
63°
11
84°
62°
12
85°
64°
13
85°
67°
14
84°
65°
15
84°
67°
16
88°
66°
17
84°
64°
18
86°
63°
19
84°
63°
20
83°
62°
21
83°
60°
22
84°
60°
23
88°
65°
24
89°
66°
25
90°
65°
26
90°
65°
27
89°
59°
28
88°
60°
29
83°
62°
30
82°
60°
31
81°
58°
1
82°
57°
2
81°
57°
3
80°
55°
4
80°
56°
5
81°
60°
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 80° to 93°, with overnight lows between 55° and 72°. The average high for August is 87° with an average low of 65°. 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.