S
M
T
W
T
F
S
28
54°
10°
29
19°
9°
30
37°
12°
31
45°
30°
1
30°
18°
2
27°
23°
3
36°
19°
4
39°
21°
5
45°
34°
6
48°
30°
7
63°
27°
8
59°
39°
9
45°
34°
10
43°
25°
11
34°
21°
12
50°
27°
13
50°
37°
14
41°
18°
15
32°
10°
16
39°
12°
17
12°
5°
18
28°
7°
19
16°
1°
20
30°
12°
21
43°
18°
22
32°
9°
23
7°
-9°
24
3°
-6°
25
12°
-2°
26
12°
-8°
27
21°
5°
28
28°
10°
29
21°
5°
30
16°
-2°
31
25°
0°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Plano
Plano's January 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for January is ° with an average low of °. 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.
