S
M
T
W
T
F
S
26
84°
62°
27
83°
65°
28
76°
64°
29
71°
57°
30
64°
50°
1
65°
49°
2
71°
48°
3
75°
45°
4
80°
56°
5
71°
52°
6
56°
48°
7
70°
45°
8
75°
50°
9
84°
58°
10
80°
60°
11
77°
53°
12
80°
49°
13
86°
54°
14
80°
62°
15
88°
72°
16
86°
67°
17
90°
72°
18
86°
68°
19
80°
63°
20
78°
64°
21
79°
63°
22
81°
60°
23
79°
60°
24
83°
64°
25
84°
65°
26
82°
63°
27
82°
67°
28
85°
68°
29
84°
67°
30
81°
66°
31
81°
64°
1
82°
65°
2
82°
68°
3
82°
68°
4
86°
69°
5
87°
70°
6
87°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hillemann
Hillemann's May 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 54° and 72°. The average high for May is 83° with an average low of 66°. 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 Hillemann. See also: June | July | August.