S
M
T
W
T
F
S
26
73°
47°
27
72°
47°
28
59°
45°
29
57°
37°
30
55°
35°
1
53°
31°
2
58°
45°
3
67°
44°
4
74°
41°
5
55°
37°
6
51°
33°
7
53°
34°
8
63°
38°
9
67°
43°
10
64°
43°
11
64°
44°
12
66°
45°
13
66°
44°
14
69°
46°
15
63°
45°
16
64°
45°
17
63°
51°
18
67°
51°
19
70°
52°
20
72°
54°
21
74°
53°
22
66°
48°
23
65°
45°
24
63°
47°
25
65°
48°
26
66°
54°
27
68°
51°
28
67°
49°
29
67°
49°
30
75°
53°
31
69°
49°
1
69°
58°
2
75°
53°
3
69°
52°
4
70°
50°
5
70°
50°
6
71°
51°
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 51° to 75°, with overnight lows between 31° and 58°. The average high for May is 66° with an average low of 47°. 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.
