S
M
T
W
T
F
S
26
71°
50°
27
72°
46°
28
78°
42°
29
82°
49°
30
84°
51°
1
88°
59°
2
81°
55°
3
78°
50°
4
69°
46°
5
61°
49°
6
80°
55°
7
90°
56°
8
93°
55°
9
94°
58°
10
96°
59°
11
99°
61°
12
94°
61°
13
94°
60°
14
93°
58°
15
83°
51°
16
86°
56°
17
88°
57°
18
88°
57°
19
87°
56°
20
89°
57°
21
89°
57°
22
88°
56°
23
89°
58°
24
90°
59°
25
91°
59°
26
91°
58°
27
90°
58°
28
87°
54°
29
82°
55°
30
83°
55°
31
82°
56°
1
83°
58°
2
88°
59°
3
90°
60°
4
90°
60°
5
92°
59°
6
91°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cartago
Cartago's May 2026 forecast shows daily high temperatures ranging from 61° to 99°, with overnight lows between 46° and 61°. The average high for May is 87° with an average low of 57°. 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 Cartago. See also: June | July | August.