S
M
T
W
T
F
S
26
85°
72°
27
91°
72°
28
87°
68°
29
87°
71°
30
86°
74°
1
90°
70°
2
88°
63°
3
85°
62°
4
86°
61°
5
89°
66°
6
89°
70°
7
88°
70°
8
85°
66°
9
87°
68°
10
86°
69°
11
87°
68°
12
88°
68°
13
86°
69°
14
87°
67°
15
84°
70°
16
85°
69°
17
85°
70°
18
87°
70°
19
88°
71°
20
87°
70°
21
88°
71°
22
88°
72°
23
87°
72°
24
89°
71°
25
89°
72°
26
88°
72°
27
88°
71°
28
86°
72°
29
87°
73°
30
86°
72°
31
84°
73°
1
84°
73°
2
85°
72°
3
84°
73°
4
85°
74°
5
86°
74°
6
85°
73°
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 84° to 90°, with overnight lows between 61° and 74°. The average high for May is 87° with an average low of 70°. 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.