S
M
T
W
T
F
S
26
77°
44°
27
81°
48°
28
83°
50°
29
84°
52°
30
81°
51°
1
80°
49°
2
76°
43°
3
77°
45°
4
77°
47°
5
83°
52°
6
86°
52°
7
88°
53°
8
88°
54°
9
87°
53°
10
88°
54°
11
88°
54°
12
87°
53°
13
83°
50°
14
81°
50°
15
82°
51°
16
84°
52°
17
83°
52°
18
81°
47°
19
82°
50°
20
84°
55°
21
89°
57°
22
90°
56°
23
85°
53°
24
85°
56°
25
87°
50°
26
89°
57°
27
94°
57°
28
93°
58°
29
95°
60°
30
97°
60°
31
98°
59°
1
99°
61°
2
98°
59°
3
97°
60°
4
98°
61°
5
99°
60°
6
97°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Buenos Aires
Buenos Aires's May 2026 forecast shows daily high temperatures ranging from 76° to 99°, with overnight lows between 43° and 61°. The average high for May is 87° with an average low of 53°. 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 Buenos Aires. See also: June | July | August.
