S
M
T
W
T
F
S
26
59°
50°
27
64°
49°
28
71°
46°
29
75°
47°
30
74°
46°
1
75°
46°
2
59°
50°
3
66°
49°
4
64°
53°
5
66°
54°
6
71°
51°
7
68°
49°
8
74°
52°
9
78°
54°
10
85°
55°
11
86°
54°
12
82°
54°
13
82°
52°
14
77°
53°
15
75°
54°
16
72°
50°
17
75°
53°
18
74°
54°
19
75°
54°
20
76°
53°
21
75°
53°
22
73°
54°
23
76°
55°
24
77°
55°
25
77°
54°
26
76°
52°
27
69°
54°
28
69°
53°
29
70°
54°
30
70°
54°
31
71°
55°
1
73°
55°
2
77°
56°
3
74°
55°
4
71°
54°
5
71°
53°
6
70°
53°
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 64° to 86°, with overnight lows between 49° and 56°. The average high for May is 74° with an average low of 53°. 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.
