S
M
T
W
T
F
S
26
41°
33°
27
38°
27°
28
38°
26°
29
40°
29°
30
56°
28°
1
56°
36°
2
63°
43°
3
54°
41°
4
48°
38°
5
43°
38°
6
49°
40°
7
62°
40°
8
57°
39°
9
47°
36°
10
45°
35°
11
52°
38°
12
56°
38°
13
45°
37°
14
61°
42°
15
50°
43°
16
53°
44°
17
59°
40°
18
51°
36°
19
50°
36°
20
53°
40°
21
54°
36°
22
55°
38°
23
51°
37°
24
56°
39°
25
55°
40°
26
58°
42°
27
56°
36°
28
52°
36°
29
53°
38°
30
54°
38°
31
54°
39°
1
55°
38°
2
54°
40°
3
54°
39°
4
55°
39°
5
54°
40°
6
55°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Long Harbour-Mount Arlington Heights
Long Harbour-Mount Arlington Heights's May 2026 forecast shows daily high temperatures ranging from 50° to 61°, with overnight lows between 36° and 44°. The average high for May is 54° with an average low of 39°. 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 Long Harbour-Mount Arlington Heights. See also: June | July | August.
