S
M
T
W
T
F
S
26
62°
46°
27
62°
41°
28
65°
49°
29
68°
48°
30
72°
47°
1
65°
47°
2
66°
44°
3
62°
48°
4
73°
49°
5
64°
44°
6
62°
44°
7
64°
46°
8
69°
45°
9
65°
46°
10
63°
45°
11
63°
45°
12
65°
49°
13
75°
56°
14
76°
57°
15
76°
57°
16
77°
56°
17
75°
56°
18
70°
55°
19
70°
53°
20
75°
57°
21
74°
52°
22
68°
50°
23
69°
52°
24
68°
51°
25
70°
54°
26
73°
59°
27
77°
60°
28
79°
54°
29
79°
54°
30
69°
56°
31
71°
61°
1
79°
54°
2
75°
53°
3
72°
52°
4
71°
53°
5
72°
58°
6
74°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fairfax
Fairfax's May 2026 forecast shows daily high temperatures ranging from 62° to 79°, with overnight lows between 41° and 61°. 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 Fairfax. See also: June | July | August.
