S
M
T
W
T
F
S
26
60°
43°
27
66°
46°
28
63°
47°
29
64°
40°
30
58°
34°
1
57°
34°
2
63°
40°
3
69°
46°
4
70°
46°
5
64°
36°
6
58°
35°
7
60°
38°
8
61°
37°
9
61°
37°
10
66°
38°
11
69°
39°
12
72°
43°
13
73°
45°
14
72°
42°
15
73°
48°
16
75°
45°
17
64°
39°
18
63°
39°
19
65°
41°
20
65°
43°
21
66°
40°
22
65°
43°
23
65°
45°
24
66°
40°
25
63°
40°
26
64°
41°
27
65°
40°
28
68°
41°
29
76°
48°
30
77°
42°
31
70°
42°
1
72°
45°
2
73°
46°
3
74°
47°
4
78°
43°
5
76°
43°
6
76°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Highland
Highland's May 2026 forecast shows daily high temperatures ranging from 57° to 78°, with overnight lows between 34° and 48°. The average high for May is 67° with an average low of 42°. 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 Highland. See also: June | July | August.