S
M
T
W
T
F
S
28
45°
43°
29
43°
39°
30
41°
30°
31
43°
25°
1
43°
34°
2
37°
27°
3
36°
30°
4
36°
25°
5
36°
21°
6
37°
21°
7
41°
32°
8
37°
25°
9
41°
34°
10
36°
25°
11
46°
32°
12
50°
45°
13
48°
32°
14
41°
30°
15
45°
36°
16
43°
30°
17
45°
36°
18
43°
37°
19
48°
41°
20
48°
45°
21
46°
41°
22
46°
41°
23
46°
41°
24
46°
43°
25
45°
39°
26
39°
37°
27
43°
39°
28
43°
32°
29
39°
37°
30
43°
37°
31
48°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Castleton
Castleton'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 Castleton. See also: February | March | April.
