S
M
T
W
T
F
S
26
58°
44°
27
71°
38°
28
65°
45°
29
62°
52°
30
71°
44°
1
67°
51°
2
59°
42°
3
63°
43°
4
71°
54°
5
77°
58°
6
72°
57°
7
67°
47°
8
63°
45°
9
64°
49°
10
67°
50°
11
66°
51°
12
68°
50°
13
70°
52°
14
67°
56°
15
68°
55°
16
68°
54°
17
67°
57°
18
69°
59°
19
77°
59°
20
76°
58°
21
75°
60°
22
78°
60°
23
78°
61°
24
77°
60°
25
74°
58°
26
71°
60°
27
72°
61°
28
79°
62°
29
77°
62°
30
78°
61°
31
77°
62°
1
75°
57°
2
71°
56°
3
72°
56°
4
72°
57°
5
73°
56°
6
73°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lorton
Lorton's May 2026 forecast shows daily high temperatures ranging from 59° to 79°, with overnight lows between 42° and 62°. The average high for May is 71° with an average low of 55°. 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 Lorton. See also: June | July | August.