S
M
T
W
T
F
S
27
51°
37°
28
57°
35°
29
52°
34°
30
54°
38°
31
53°
34°
1
52°
30°
2
47°
28°
3
47°
25°
4
48°
30°
5
50°
34°
6
49°
33°
7
46°
32°
8
45°
35°
9
46°
32°
10
53°
28°
11
53°
31°
12
54°
34°
13
55°
34°
14
54°
33°
15
51°
35°
16
53°
39°
17
60°
42°
18
57°
43°
19
56°
45°
20
60°
47°
21
Hist. Avg.
57°
37°
22
Hist. Avg.
57°
37°
23
Hist. Avg.
58°
37°
24
Hist. Avg.
58°
37°
25
Hist. Avg.
58°
37°
26
Hist. Avg.
58°
37°
27
Hist. Avg.
58°
38°
28
Hist. Avg.
58°
38°
29
Hist. Avg.
58°
38°
30
Hist. Avg.
58°
38°
31
Hist. Avg.
59°
38°
1
Hist. Avg.
59°
38°
2
Hist. Avg.
59°
39°
3
Hist. Avg.
59°
39°
4
Hist. Avg.
59°
39°
5
Hist. Avg.
59°
39°
6
Hist. Avg.
60°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Plano
Plano's January 2027 forecast shows daily high temperatures ranging from 45° to 60°, with overnight lows between 25° and 47°. The average high for January is 52° with an average low of 35°. 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 Plano. See also: February | March | April.