S
M
T
W
T
F
S
26
58°
44°
27
70°
35°
28
65°
45°
29
60°
53°
30
70°
44°
1
69°
34°
2
62°
47°
3
64°
39°
4
79°
40°
5
85°
47°
6
72°
57°
7
63°
45°
8
73°
36°
9
76°
50°
10
83°
44°
11
63°
43°
12
74°
36°
13
76°
53°
14
63°
48°
15
73°
44°
16
85°
58°
17
89°
62°
18
95°
66°
19
95°
70°
20
92°
64°
21
74°
52°
22
73°
55°
23
76°
54°
24
77°
55°
25
82°
60°
26
83°
62°
27
88°
57°
28
80°
61°
29
73°
61°
30
78°
62°
31
77°
59°
1
74°
57°
2
74°
56°
3
73°
56°
4
74°
57°
5
77°
64°
6
83°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Manassas
Manassas's May 2026 forecast shows daily high temperatures ranging from 63° to 95°, with overnight lows between 44° and 70°. The average high for May is 80° with an average low of 59°. 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 Manassas. See also: June | July | August.
