S
M
T
W
T
F
S
26
60°
44°
27
68°
51°
28
64°
50°
29
57°
39°
30
54°
41°
1
47°
36°
2
51°
42°
3
63°
49°
4
72°
47°
5
55°
43°
6
56°
42°
7
53°
42°
8
61°
49°
9
61°
48°
10
63°
47°
11
63°
50°
12
67°
52°
13
70°
50°
14
67°
53°
15
64°
49°
16
64°
49°
17
65°
57°
18
73°
57°
19
67°
56°
20
70°
58°
21
74°
58°
22
70°
57°
23
74°
54°
24
67°
52°
25
67°
55°
26
69°
60°
27
73°
58°
28
69°
57°
29
69°
53°
30
71°
52°
31
70°
53°
1
70°
58°
2
79°
58°
3
70°
56°
4
71°
54°
5
71°
54°
6
72°
55°
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 47° to 79°, with overnight lows between 36° and 60°. The average high for May is 66° with an average low of 52°. 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.
