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
68°
44°
3
70°
52°
4
63°
36°
5
51°
34°
6
50°
37°
7
55°
36°
8
61°
40°
9
66°
42°
10
67°
45°
11
66°
46°
12
71°
50°
13
67°
49°
14
65°
48°
15
68°
47°
16
71°
53°
17
72°
52°
18
71°
54°
19
70°
53°
20
69°
51°
21
64°
46°
22
63°
46°
23
65°
47°
24
65°
46°
25
66°
47°
26
65°
48°
27
65°
48°
28
66°
49°
29
68°
58°
30
67°
54°
31
68°
52°
1
74°
58°
2
76°
60°
3
78°
60°
4
79°
62°
5
79°
62°
6
78°
61°
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 50° to 79°, with overnight lows between 34° and 62°. The average high for May is 67° with an average low of 49°. 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.
