S
M
T
W
T
F
S
26
60°
43°
27
70°
46°
28
65°
51°
29
64°
49°
30
64°
42°
1
60°
38°
2
55°
39°
3
59°
42°
4
64°
46°
5
65°
46°
6
66°
50°
7
68°
49°
8
70°
51°
9
68°
50°
10
66°
49°
11
65°
50°
12
66°
55°
13
68°
51°
14
65°
49°
15
64°
48°
16
62°
48°
17
62°
47°
18
66°
48°
19
70°
57°
20
71°
52°
21
67°
50°
22
68°
49°
23
67°
50°
24
68°
56°
25
75°
59°
26
73°
53°
27
68°
51°
28
67°
51°
29
69°
52°
30
72°
57°
31
77°
60°
1
78°
60°
2
78°
61°
3
79°
62°
4
80°
61°
5
78°
56°
6
71°
55°
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 55° to 80°, with overnight lows between 38° and 62°. The average high for May is 68° with an average low of 51°. 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.
