S
M
T
W
T
F
S
26
72°
52°
27
71°
49°
28
70°
49°
29
73°
51°
30
73°
53°
1
77°
52°
2
71°
49°
3
69°
47°
4
69°
50°
5
70°
49°
6
68°
52°
7
67°
49°
8
67°
46°
9
69°
44°
10
67°
44°
11
67°
45°
12
72°
48°
13
66°
50°
14
67°
49°
15
71°
45°
16
70°
45°
17
70°
49°
18
71°
49°
19
70°
48°
20
69°
49°
21
70°
49°
22
72°
49°
23
70°
48°
24
70°
47°
25
71°
43°
26
68°
45°
27
66°
45°
28
68°
44°
29
68°
45°
30
67°
42°
31
64°
46°
1
64°
46°
2
61°
38°
3
61°
38°
4
60°
39°
5
61°
40°
6
62°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Santiago
Santiago's May 2026 forecast shows daily high temperatures ranging from 60° to 77°, with overnight lows between 38° and 53°. The average high for May is 68° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Santiago. See also: June | July | August.
