S
M
T
W
T
F
S
26
55°
45°
27
70°
46°
28
62°
51°
29
63°
50°
30
65°
42°
1
61°
44°
2
57°
39°
3
61°
44°
4
71°
47°
5
74°
56°
6
71°
51°
7
69°
49°
8
68°
48°
9
68°
49°
10
67°
51°
11
67°
51°
12
68°
56°
13
70°
52°
14
68°
50°
15
66°
49°
16
63°
49°
17
65°
48°
18
68°
49°
19
72°
57°
20
74°
53°
21
70°
51°
22
69°
50°
23
69°
51°
24
71°
57°
25
78°
59°
26
76°
54°
27
71°
52°
28
70°
52°
29
72°
53°
30
75°
58°
31
80°
61°
1
80°
61°
2
81°
62°
3
82°
63°
4
83°
62°
5
81°
57°
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 57° to 83°, with overnight lows between 39° and 63°. The average high for May is 70° 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.
