S
M
T
W
T
F
S
26
80°
61°
27
79°
56°
28
68°
48°
29
66°
39°
30
68°
41°
1
70°
40°
2
70°
45°
3
87°
46°
4
84°
64°
5
69°
48°
6
64°
45°
7
76°
43°
8
82°
50°
9
86°
45°
10
71°
46°
11
79°
40°
12
86°
52°
13
82°
60°
14
89°
63°
15
92°
69°
16
91°
71°
17
88°
72°
18
89°
52°
19
72°
51°
20
72°
52°
21
78°
56°
22
80°
62°
23
79°
63°
24
80°
63°
25
81°
61°
26
82°
66°
27
83°
64°
28
81°
59°
29
85°
63°
30
85°
62°
31
81°
64°
1
78°
62°
2
79°
64°
3
86°
66°
4
87°
66°
5
87°
66°
6
86°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Middleton
Middleton's May 2026 forecast shows daily high temperatures ranging from 72° to 92°, with overnight lows between 51° and 72°. The average high for May is 83° with an average low of 63°. 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 Middleton. See also: June | July | August.