S
M
T
W
T
F
S
26
55°
43°
27
54°
39°
28
54°
40°
29
55°
36°
30
61°
44°
1
63°
45°
2
65°
38°
3
56°
38°
4
56°
39°
5
55°
36°
6
58°
37°
7
57°
41°
8
57°
42°
9
58°
40°
10
58°
39°
11
66°
46°
12
62°
42°
13
60°
41°
14
61°
40°
15
60°
40°
16
60°
41°
17
63°
51°
18
70°
50°
19
63°
49°
20
65°
46°
21
71°
51°
22
66°
44°
23
70°
45°
24
73°
48°
25
74°
52°
26
75°
53°
27
76°
54°
28
77°
55°
29
77°
52°
30
72°
55°
31
68°
54°
1
69°
54°
2
73°
53°
3
71°
54°
4
76°
46°
5
71°
58°
6
79°
58°
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 54° to 79°, with overnight lows between 36° and 58°. The average high for May is 65° with an average low of 46°. 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.
