S
M
T
W
T
F
S
26
72°
54°
27
79°
54°
28
74°
51°
29
78°
46°
30
80°
46°
31
87°
47°
1
72°
53°
2
73°
48°
3
76°
44°
4
83°
46°
5
90°
47°
6
90°
50°
7
86°
54°
8
85°
52°
9
80°
47°
10
77°
50°
11
80°
50°
12
79°
56°
13
81°
52°
14
80°
51°
15
81°
52°
16
83°
52°
17
81°
54°
18
74°
53°
19
76°
52°
20
79°
54°
21
80°
53°
22
79°
53°
23
82°
52°
24
80°
52°
25
83°
50°
26
81°
51°
27
79°
52°
28
71°
48°
29
71°
45°
30
73°
45°
31
78°
48°
1
78°
51°
2
77°
50°
3
78°
50°
4
77°
49°
5
77°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Olympia
Olympia's August 2026 forecast shows daily high temperatures ranging from 71° to 83°, with overnight lows between 45° and 54°. The average high for August is 78° with an average low of 51°. 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 Olympia. See also: September | October | November.