S
M
T
W
T
F
S
27
28°
19°
28
31°
20°
29
37°
21°
30
36°
24°
31
40°
25°
1
39°
13°
2
40°
8°
3
38°
5°
4
22°
6°
5
21°
15°
6
25°
17°
7
33°
13°
8
31°
19°
9
33°
3°
10
32°
1°
11
25°
3°
12
19°
-1°
13
24°
0°
14
16°
3°
15
17°
5°
16
21°
12°
17
26°
13°
18
31°
13°
19
32°
17°
20
28°
19°
21
33°
18°
22
31°
13°
23
29°
14°
24
27°
14°
25
30°
17°
26
31°
19°
27
32°
19°
28
34°
21°
29
Hist. Avg.
28°
11°
30
Hist. Avg.
28°
11°
31
Hist. Avg.
28°
11°
1
Hist. Avg.
29°
12°
2
Hist. Avg.
29°
12°
3
Hist. Avg.
29°
12°
4
Hist. Avg.
29°
12°
5
Hist. Avg.
29°
12°
6
Hist. Avg.
30°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Fairfax
Fairfax's January 2027 forecast shows daily high temperatures ranging from 16° to 40°, with overnight lows between -1° and 25°. The average high for January is 29° with an average low of 13°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in Fairfax. See also: February | March | April.
