S
M
T
W
T
F
S
26
87°
71°
27
88°
72°
28
86°
72°
29
86°
70°
30
85°
68°
1
70°
57°
2
73°
55°
3
76°
49°
4
77°
53°
5
82°
60°
6
86°
72°
7
78°
66°
8
84°
69°
9
79°
66°
10
82°
65°
11
81°
67°
12
83°
67°
13
85°
67°
14
89°
64°
15
85°
67°
16
84°
67°
17
86°
73°
18
88°
75°
19
87°
76°
20
85°
71°
21
83°
71°
22
87°
70°
23
75°
65°
24
76°
70°
25
82°
72°
26
84°
74°
27
85°
73°
28
82°
72°
29
82°
73°
30
86°
72°
31
85°
73°
1
86°
71°
2
83°
67°
3
83°
69°
4
86°
70°
5
85°
71°
6
87°
78°
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 87°, with overnight lows between 67° and 78°. The average high for May is 84° with an average low of 72°. 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.
