S
M
T
W
T
F
S
27
50°
32°
28
49°
34°
29
51°
35°
30
51°
42°
31
52°
37°
1
54°
39°
2
52°
41°
3
54°
34°
4
51°
33°
5
51°
37°
6
52°
38°
7
48°
43°
8
50°
43°
9
54°
42°
10
56°
39°
11
53°
43°
12
56°
44°
13
57°
40°
14
54°
41°
15
51°
44°
16
51°
35°
17
52°
36°
18
57°
37°
19
59°
43°
20
Hist. Avg.
57°
40°
21
Hist. Avg.
57°
40°
22
Hist. Avg.
57°
40°
23
Hist. Avg.
57°
40°
24
Hist. Avg.
58°
40°
25
Hist. Avg.
58°
40°
26
Hist. Avg.
58°
40°
27
Hist. Avg.
58°
40°
28
Hist. Avg.
58°
40°
29
Hist. Avg.
58°
40°
30
Hist. Avg.
59°
40°
31
Hist. Avg.
59°
40°
1
Hist. Avg.
59°
40°
2
Hist. Avg.
59°
40°
3
Hist. Avg.
60°
40°
4
Hist. Avg.
60°
41°
5
Hist. Avg.
60°
41°
6
Hist. Avg.
60°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Thornton
Thornton's January 2027 forecast shows daily high temperatures ranging from 48° to 59°, with overnight lows between 32° and 44°. The average high for January is 53° with an average low of 39°. 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 Thornton. See also: February | March | April.
