S
M
T
W
T
F
S
27
61°
50°
28
86°
57°
29
75°
50°
30
64°
50°
1
73°
59°
2
68°
46°
3
59°
45°
4
64°
43°
5
61°
46°
6
72°
45°
7
77°
52°
8
75°
52°
9
72°
46°
10
81°
43°
11
81°
54°
12
81°
54°
13
79°
59°
14
84°
63°
15
90°
68°
16
86°
57°
17
72°
52°
18
77°
50°
19
77°
59°
20
73°
57°
21
68°
52°
22
64°
46°
23
70°
45°
24
73°
54°
25
64°
57°
26
70°
54°
27
73°
55°
28
72°
55°
29
68°
55°
30
79°
54°
31
82°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ashburn
Ashburn's May 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Ashburn. See also: June | July | August.