S
M
T
W
T
F
S
26
61°
39°
27
70°
39°
28
68°
41°
29
64°
43°
30
54°
46°
1
63°
41°
2
59°
46°
3
55°
41°
4
68°
45°
5
73°
52°
6
66°
55°
7
64°
45°
8
61°
45°
9
64°
46°
10
66°
52°
11
63°
50°
12
66°
43°
13
66°
48°
14
64°
52°
15
68°
48°
16
75°
48°
17
86°
61°
18
86°
61°
19
90°
66°
20
91°
64°
21
64°
54°
22
68°
48°
23
57°
46°
24
55°
46°
25
77°
55°
26
81°
57°
27
81°
61°
28
77°
55°
29
75°
49°
30
57°
44°
31
72°
52°
1
68°
45°
2
71°
50°
3
72°
53°
4
74°
57°
5
84°
64°
6
83°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Winthrop
Winthrop's May 2026 forecast shows daily high temperatures ranging from 57° to 84°, with overnight lows between 44° and 64°. The average high for May is 73° with an average low of 52°. 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 Winthrop. See also: June | July | August.
