S
M
T
W
T
F
S
26
67°
41°
27
69°
43°
28
64°
42°
29
64°
43°
30
61°
42°
31
65°
40°
1
61°
40°
2
62°
41°
3
66°
42°
4
62°
41°
5
62°
38°
6
63°
37°
7
62°
38°
8
62°
40°
9
63°
40°
10
63°
41°
11
67°
45°
12
69°
42°
13
72°
41°
14
68°
37°
15
64°
36°
16
62°
38°
17
63°
39°
18
67°
42°
19
68°
41°
20
72°
40°
21
71°
39°
22
67°
42°
23
68°
40°
24
67°
44°
25
69°
43°
26
73°
44°
27
73°
44°
28
67°
43°
29
71°
41°
30
69°
42°
31
68°
41°
1
69°
43°
2
68°
44°
3
73°
41°
4
70°
43°
5
75°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Santiago
Santiago's August 2026 forecast shows daily high temperatures ranging from 61° to 75°, with overnight lows between 36° and 45°. The average high for August is 67° with an average low of 41°. 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 Santiago. See also: September | October | November.
