S
M
T
W
T
F
S
26
86°
65°
27
87°
71°
28
77°
66°
29
71°
59°
30
67°
53°
1
70°
52°
2
75°
47°
3
81°
45°
4
80°
50°
5
81°
66°
6
71°
53°
7
73°
48°
8
77°
50°
9
86°
62°
10
77°
62°
11
79°
52°
12
82°
48°
13
88°
51°
14
83°
58°
15
89°
59°
16
87°
72°
17
87°
71°
18
87°
77°
19
82°
65°
20
80°
62°
21
77°
65°
22
82°
67°
23
78°
66°
24
85°
63°
25
87°
63°
26
87°
64°
27
81°
66°
28
83°
67°
29
88°
71°
30
92°
73°
31
94°
71°
1
98°
70°
2
94°
67°
3
87°
65°
4
84°
69°
5
85°
69°
6
86°
68°
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 84° to 98°, with overnight lows between 65° and 73°. The average high for May is 90° with an average low of 69°. 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.
