S
M
T
W
T
F
S
26
85°
61°
27
84°
70°
28
82°
64°
29
68°
61°
30
66°
50°
1
66°
48°
2
70°
43°
3
73°
41°
4
81°
59°
5
70°
61°
6
68°
52°
7
68°
48°
8
77°
56°
9
81°
56°
10
79°
54°
11
71°
49°
12
74°
55°
13
79°
55°
14
75°
56°
15
80°
62°
16
84°
61°
17
84°
62°
18
85°
66°
19
83°
68°
20
84°
68°
21
81°
61°
22
77°
65°
23
78°
65°
24
77°
64°
25
77°
65°
26
78°
66°
27
78°
64°
28
79°
64°
29
79°
64°
30
78°
63°
31
78°
64°
1
79°
63°
2
81°
66°
3
82°
67°
4
81°
68°
5
80°
68°
6
83°
69°
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 71° to 85°, with overnight lows between 49° and 69°. The average high for May is 79° with an average low of 62°. 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.