S
M
T
W
T
F
S
26
55°
45°
27
72°
41°
28
63°
50°
29
59°
55°
30
66°
45°
1
68°
37°
2
59°
43°
3
63°
37°
4
79°
45°
5
84°
55°
6
72°
55°
7
66°
46°
8
73°
43°
9
75°
55°
10
81°
50°
11
63°
46°
12
72°
41°
13
75°
54°
14
63°
50°
15
72°
50°
16
84°
60°
17
86°
62°
18
98°
67°
19
94°
68°
20
90°
61°
21
64°
51°
22
62°
52°
23
75°
57°
24
76°
61°
25
78°
59°
26
79°
60°
27
80°
60°
28
79°
61°
29
80°
57°
30
81°
62°
31
80°
61°
1
81°
62°
2
77°
62°
3
74°
62°
4
77°
62°
5
75°
59°
6
77°
63°
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 62° to 98°, with overnight lows between 51° and 68°. The average high for May is 79° with an average low of 60°. 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.
