S
M
T
W
T
F
S
26
66°
45°
27
70°
46°
28
63°
46°
29
64°
46°
30
N/A
1
74°
47°
2
70°
55°
3
64°
47°
4
63°
45°
5
61°
45°
6
59°
41°
7
59°
40°
8
62°
44°
9
64°
47°
10
64°
49°
11
65°
49°
12
67°
50°
13
58°
43°
14
59°
40°
15
62°
47°
16
63°
48°
17
63°
47°
18
64°
48°
19
62°
47°
20
60°
46°
21
61°
45°
22
61°
43°
23
62°
44°
24
62°
45°
25
60°
42°
26
60°
44°
27
64°
49°
28
63°
50°
29
67°
50°
30
65°
45°
31
61°
44°
1
60°
44°
2
60°
43°
3
61°
45°
4
61°
44°
5
62°
44°
6
62°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Windsor
Windsor's May 2026 forecast shows daily high temperatures ranging from 58° to 74°, with overnight lows between 40° and 55°. The average high for May is 63° with an average low of 46°. 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 Windsor. See also: June | July | August.