S
M
T
W
T
F
S
26
46°
30°
27
42°
26°
28
45°
33°
29
46°
28°
30
43°
29°
1
51°
28°
2
62°
34°
3
64°
40°
4
62°
35°
5
35°
25°
6
44°
21°
7
59°
37°
8
63°
36°
9
60°
36°
10
63°
34°
11
75°
46°
12
73°
40°
13
82°
46°
14
66°
43°
15
69°
36°
16
68°
38°
17
53°
32°
18
32°
26°
19
41°
10°
20
52°
29°
21
51°
30°
22
51°
31°
23
64°
38°
24
71°
47°
25
68°
49°
26
65°
43°
27
63°
44°
28
69°
45°
29
69°
37°
30
65°
41°
31
66°
40°
1
64°
42°
2
67°
43°
3
68°
44°
4
70°
46°
5
70°
46°
6
68°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Arlington
Arlington's May 2026 forecast shows daily high temperatures ranging from 63° to 71°, with overnight lows between 37° and 49°. The average high for May is 67° 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 Arlington. See also: June | July | August.