S
M
T
W
T
F
S
27
52°
30°
28
52°
32°
29
53°
34°
30
50°
33°
31
52°
31°
1
51°
29°
2
49°
31°
3
52°
43°
4
55°
46°
5
60°
48°
6
65°
39°
7
66°
30°
8
54°
31°
9
50°
31°
10
49°
30°
11
50°
29°
12
50°
28°
13
48°
28°
14
48°
29°
15
50°
30°
16
50°
30°
17
49°
29°
18
48°
26°
19
46°
25°
20
46°
29°
21
49°
43°
22
56°
44°
23
63°
42°
24
59°
38°
25
53°
32°
26
55°
33°
27
56°
38°
28
57°
34°
29
57°
38°
30
48°
29°
31
49°
25°
1
47°
33°
2
Hist. Avg.
59°
38°
3
Hist. Avg.
59°
38°
4
Hist. Avg.
59°
38°
5
Hist. Avg.
59°
38°
6
Hist. Avg.
59°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Grayson
Grayson's January 2027 forecast shows daily high temperatures ranging from 46° to 66°, with overnight lows between 25° and 48°. The average high for January is 53° with an average low of 33°. 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 Grayson. See also: February | March | April.