S
M
T
W
T
F
S
26
62°
43°
27
56°
44°
28
52°
36°
29
55°
36°
30
54°
37°
1
54°
37°
2
70°
32°
3
72°
48°
4
61°
37°
5
52°
30°
6
49°
35°
7
62°
39°
8
70°
46°
9
67°
39°
10
60°
37°
11
66°
47°
12
68°
44°
13
71°
52°
14
73°
50°
15
71°
52°
16
65°
47°
17
67°
49°
18
71°
52°
19
70°
50°
20
64°
45°
21
65°
46°
22
64°
46°
23
64°
50°
24
65°
56°
25
67°
56°
26
68°
52°
27
72°
56°
28
74°
58°
29
76°
59°
30
76°
60°
31
77°
59°
1
73°
55°
2
77°
61°
3
79°
61°
4
75°
57°
5
68°
54°
6
69°
55°
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 49° to 79°, with overnight lows between 35° and 61°. The average high for May is 69° with an average low of 51°. 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.
