S
M
T
W
T
F
S
26
57°
41°
27
64°
39°
28
63°
45°
29
57°
46°
30
46°
36°
1
55°
32°
2
43°
32°
3
52°
30°
4
66°
41°
5
72°
55°
6
59°
43°
7
54°
39°
8
59°
39°
9
61°
46°
10
63°
45°
11
55°
43°
12
64°
39°
13
61°
45°
14
45°
37°
15
59°
37°
16
70°
50°
17
79°
61°
18
84°
66°
19
81°
64°
20
75°
59°
21
59°
46°
22
50°
45°
23
46°
41°
24
64°
45°
25
72°
59°
26
70°
61°
27
73°
61°
28
68°
42°
29
73°
50°
30
69°
41°
31
70°
46°
1
69°
43°
2
63°
43°
3
66°
46°
4
69°
51°
5
75°
53°
6
72°
52°
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 63° to 75°, with overnight lows between 41° and 53°. The average high for May is 69° with an average low of 47°. 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.
