S
M
T
W
T
F
S
26
69°
45°
27
61°
39°
28
73°
42°
29
75°
45°
30
77°
42°
1
79°
53°
2
64°
40°
3
66°
38°
4
74°
42°
5
78°
60°
6
87°
67°
7
69°
48°
8
58°
44°
9
64°
40°
10
64°
30°
11
68°
33°
12
72°
39°
13
65°
45°
14
66°
41°
15
67°
37°
16
63°
44°
17
53°
36°
18
61°
31°
19
68°
33°
20
65°
37°
21
56°
38°
22
57°
33°
23
60°
33°
24
57°
44°
25
64°
42°
26
64°
39°
27
78°
49°
28
67°
49°
29
67°
50°
30
65°
42°
31
68°
40°
1
66°
48°
2
61°
48°
3
65°
56°
4
71°
55°
5
71°
57°
6
67°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rosario
Rosario's May 2026 forecast shows daily high temperatures ranging from 61° to 71°, with overnight lows between 48° and 57°. The average high for May is 67° 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 Rosario. See also: June | July | August.
