S
M
T
W
T
F
S
26
58°
44°
27
70°
37°
28
63°
49°
29
60°
54°
30
69°
41°
1
68°
38°
2
59°
42°
3
64°
42°
4
75°
56°
5
85°
65°
6
76°
62°
7
68°
43°
8
64°
43°
9
63°
46°
10
69°
50°
11
67°
48°
12
66°
47°
13
67°
53°
14
69°
53°
15
73°
54°
16
74°
56°
17
75°
57°
18
75°
57°
19
74°
56°
20
75°
58°
21
75°
58°
22
72°
50°
23
66°
50°
24
67°
51°
25
68°
53°
26
69°
52°
27
68°
51°
28
68°
54°
29
69°
52°
30
69°
57°
31
72°
61°
1
75°
60°
2
71°
57°
3
71°
58°
4
76°
61°
5
76°
61°
6
79°
62°
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 59° to 85°, with overnight lows between 42° and 65°. The average high for May is 71° with an average low of 54°. 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.
