S
M
T
W
T
F
S
26
55°
45°
27
72°
41°
28
63°
50°
29
59°
55°
30
N/A
1
66°
47°
2
59°
41°
3
60°
41°
4
72°
54°
5
78°
58°
6
66°
47°
7
62°
40°
8
58°
39°
9
63°
48°
10
71°
50°
11
68°
53°
12
68°
55°
13
73°
53°
14
72°
52°
15
68°
54°
16
68°
53°
17
69°
56°
18
69°
58°
19
77°
58°
20
77°
59°
21
75°
59°
22
78°
60°
23
78°
60°
24
79°
59°
25
74°
56°
26
71°
59°
27
72°
60°
28
80°
61°
29
77°
61°
30
78°
60°
31
77°
61°
1
75°
56°
2
72°
55°
3
72°
54°
4
73°
54°
5
73°
55°
6
74°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ashburn
Ashburn's May 2026 forecast shows daily high temperatures ranging from 58° to 80°, with overnight lows between 39° and 61°. The average high for May is 71° with an average low of 54°. 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.
