S
M
T
W
T
F
S
26
65°
31°
27
72°
33°
28
73°
38°
29
69°
39°
30
51°
40°
1
51°
30°
2
49°
30°
3
49°
30°
4
59°
29°
5
78°
40°
6
48°
41°
7
51°
34°
8
49°
34°
9
62°
30°
10
62°
43°
11
51°
33°
12
53°
32°
13
52°
31°
14
56°
44°
15
66°
51°
16
73°
53°
17
72°
46°
18
74°
43°
19
81°
57°
20
77°
48°
21
56°
33°
22
67°
30°
23
69°
48°
24
55°
47°
25
63°
51°
26
74°
55°
27
71°
47°
28
63°
45°
29
65°
46°
30
63°
45°
31
65°
47°
1
70°
50°
2
68°
49°
3
70°
52°
4
71°
50°
5
72°
47°
6
73°
50°
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 55° to 74°, with overnight lows between 45° and 55°. 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 Windsor. See also: June | July | August.