S
M
T
W
T
F
S
26
62°
41°
27
69°
41°
28
65°
40°
29
59°
46°
30
57°
44°
1
60°
40°
2
58°
40°
3
56°
39°
4
64°
46°
5
65°
47°
6
68°
53°
7
67°
51°
8
61°
44°
9
60°
43°
10
64°
45°
11
64°
45°
12
63°
44°
13
64°
44°
14
65°
43°
15
65°
48°
16
66°
46°
17
65°
43°
18
66°
50°
19
68°
50°
20
68°
49°
21
69°
51°
22
73°
47°
23
65°
48°
24
67°
51°
25
68°
47°
26
69°
49°
27
68°
48°
28
67°
53°
29
70°
53°
30
74°
52°
31
70°
50°
1
70°
47°
2
68°
47°
3
69°
48°
4
69°
48°
5
70°
49°
6
70°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mendon
Mendon's May 2026 forecast shows daily high temperatures ranging from 56° to 74°, with overnight lows between 39° and 53°. 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 Mendon. See also: June | July | August.