S
M
T
W
T
F
S
26
46°
31°
27
48°
27°
28
51°
31°
29
53°
30°
30
49°
33°
1
57°
29°
2
68°
34°
3
69°
39°
4
67°
33°
5
33°
29°
6
39°
25°
7
63°
38°
8
65°
42°
9
65°
43°
10
67°
37°
11
81°
44°
12
71°
47°
13
84°
46°
14
77°
49°
15
80°
45°
16
73°
46°
17
64°
35°
18
39°
27°
19
54°
35°
20
64°
36°
21
63°
38°
22
71°
42°
23
72°
44°
24
69°
45°
25
71°
44°
26
72°
46°
27
71°
42°
28
65°
42°
29
65°
40°
30
69°
44°
31
72°
48°
1
67°
48°
2
76°
47°
3
78°
49°
4
79°
50°
5
80°
49°
6
77°
49°
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 39° to 80°, with overnight lows between 27° and 50°. The average high for May is 70° with an average low of 43°. 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.