S
M
T
W
T
F
S
26
83°
65°
27
87°
71°
28
86°
71°
29
87°
67°
30
76°
64°
1
65°
53°
2
73°
52°
3
77°
46°
4
78°
50°
5
83°
56°
6
85°
72°
7
78°
64°
8
69°
64°
9
71°
65°
10
83°
65°
11
80°
66°
12
85°
66°
13
85°
64°
14
88°
60°
15
87°
62°
16
84°
67°
17
84°
72°
18
86°
73°
19
88°
70°
20
86°
69°
21
87°
70°
22
85°
68°
23
82°
69°
24
83°
68°
25
82°
70°
26
85°
68°
27
84°
67°
28
84°
68°
29
83°
67°
30
87°
65°
31
88°
67°
1
89°
69°
2
89°
68°
3
85°
68°
4
85°
67°
5
86°
68°
6
85°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hillsdale
Hillsdale's May 2026 forecast shows daily high temperatures ranging from 82° to 89°, with overnight lows between 65° and 73°. The average high for May is 85° 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 Hillsdale. See also: June | July | August.