S
M
T
W
T
F
S
27
53°
32°
28
54°
33°
29
53°
30°
30
52°
32°
31
53°
29°
1
52°
29°
2
53°
38°
3
57°
45°
4
62°
48°
5
69°
43°
6
72°
34°
7
65°
30°
8
54°
34°
9
53°
31°
10
53°
32°
11
57°
29°
12
55°
28°
13
50°
29°
14
52°
30°
15
54°
29°
16
54°
29°
17
50°
26°
18
48°
24°
19
50°
26°
20
50°
31°
21
51°
42°
22
56°
37°
23
61°
34°
24
56°
30°
25
54°
30°
26
57°
33°
27
60°
36°
28
61°
40°
29
61°
40°
30
54°
35°
31
51°
29°
1
51°
31°
2
Hist. Avg.
60°
37°
3
Hist. Avg.
60°
37°
4
Hist. Avg.
60°
37°
5
Hist. Avg.
60°
37°
6
Hist. Avg.
60°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Thornton
Thornton's January 2027 forecast shows daily high temperatures ranging from 48° to 72°, with overnight lows between 24° and 48°. The average high for January is 55° 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 Thornton. See also: February | March | April.
