S
M
T
W
T
F
S
26
83°
55°
27
79°
55°
28
78°
53°
29
74°
53°
30
73°
52°
1
76°
53°
2
78°
56°
3
75°
51°
4
75°
50°
5
76°
50°
6
75°
51°
7
76°
52°
8
78°
58°
9
84°
59°
10
85°
60°
11
80°
59°
12
78°
52°
13
76°
52°
14
77°
53°
15
80°
60°
16
81°
58°
17
80°
60°
18
82°
62°
19
80°
62°
20
80°
61°
21
81°
63°
22
83°
63°
23
86°
64°
24
87°
64°
25
87°
63°
26
86°
65°
27
88°
65°
28
88°
64°
29
88°
65°
30
89°
65°
31
88°
64°
1
89°
62°
2
87°
61°
3
84°
64°
4
84°
64°
5
85°
66°
6
87°
66°
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 73° to 89°, with overnight lows between 50° and 66°. The average high for May is 82° 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 Fairfax. See also: June | July | August.
