S
M
T
W
T
F
S
26
71°
47°
27
68°
45°
28
70°
46°
29
71°
46°
30
70°
47°
1
70°
46°
2
71°
47°
3
72°
46°
4
75°
51°
5
68°
50°
6
67°
47°
7
68°
49°
8
69°
46°
9
68°
44°
10
67°
47°
11
66°
46°
12
67°
47°
13
71°
50°
14
70°
50°
15
68°
48°
16
71°
49°
17
71°
49°
18
70°
48°
19
70°
47°
20
71°
49°
21
71°
48°
22
70°
48°
23
67°
49°
24
67°
49°
25
69°
45°
26
70°
43°
27
62°
46°
28
63°
47°
29
68°
47°
30
68°
43°
31
62°
40°
1
62°
40°
2
63°
41°
3
62°
47°
4
62°
46°
5
65°
46°
6
61°
44°
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 61° to 75°, with overnight lows between 40° and 51°. 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.
