S
M
T
W
T
F
S
26
68°
48°
27
78°
43°
28
76°
59°
29
67°
51°
30
61°
41°
1
58°
38°
2
58°
34°
3
64°
31°
4
78°
45°
5
71°
58°
6
62°
43°
7
62°
37°
8
73°
38°
9
75°
54°
10
73°
50°
11
72°
43°
12
76°
41°
13
73°
50°
14
66°
44°
15
69°
39°
16
76°
51°
17
85°
61°
18
87°
59°
19
86°
73°
20
72°
56°
21
69°
52°
22
69°
57°
23
74°
60°
24
73°
59°
25
80°
61°
26
75°
60°
27
79°
59°
28
80°
51°
29
77°
55°
30
78°
50°
31
76°
53°
1
78°
53°
2
77°
53°
3
76°
58°
4
78°
60°
5
80°
62°
6
78°
60°
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 76° to 80°, with overnight lows between 50° and 62°. The average high for May is 78° with an average low of 56°. 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.
