S
M
T
W
T
F
S
31
83°
47°
1
86°
50°
2
85°
49°
3
80°
48°
4
83°
52°
5
85°
52°
6
70°
47°
7
78°
53°
8
64°
56°
9
70°
49°
10
85°
56°
11
94°
58°
12
91°
56°
13
85°
57°
14
85°
57°
15
82°
56°
16
83°
58°
17
80°
55°
18
79°
53°
19
77°
57°
20
75°
56°
21
77°
57°
22
75°
55°
23
76°
53°
24
77°
53°
25
75°
54°
26
75°
54°
27
77°
55°
28
81°
57°
29
81°
57°
30
80°
56°
1
77°
55°
2
81°
56°
3
82°
54°
4
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Fairfax
Fairfax's June 2026 forecast shows daily high temperatures ranging from 64° to 94°, with overnight lows between 47° and 58°. The average high for June is 79° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Fairfax. See also: July | August | September.