S
M
T
W
T
F
S
26
65°
47°
27
62°
44°
28
59°
39°
29
57°
37°
30
55°
35°
1
52°
35°
2
57°
39°
3
60°
40°
4
63°
46°
5
59°
45°
6
61°
44°
7
64°
42°
8
58°
38°
9
58°
37°
10
59°
45°
11
59°
48°
12
64°
49°
13
62°
44°
14
59°
43°
15
60°
42°
16
61°
42°
17
61°
43°
18
60°
41°
19
61°
42°
20
62°
42°
21
64°
46°
22
68°
52°
23
65°
45°
24
63°
43°
25
64°
44°
26
64°
45°
27
65°
48°
28
66°
47°
29
68°
50°
30
67°
53°
31
70°
53°
1
74°
55°
2
77°
56°
3
75°
58°
4
78°
57°
5
80°
57°
6
71°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Markesan
Markesan's May 2026 forecast shows daily high temperatures ranging from 52° to 80°, with overnight lows between 35° and 59°. The average high for May is 64° with an average low of 46°. 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 Markesan. See also: June | July | August.