S
M
T
W
T
F
S
27
42°
14°
28
35°
24°
29
40°
17°
30
41°
24°
31
43°
25°
1
46°
23°
2
46°
20°
3
42°
19°
4
38°
15°
5
39°
15°
6
38°
14°
7
37°
13°
8
38°
14°
9
36°
14°
10
39°
15°
11
42°
15°
12
41°
14°
13
40°
15°
14
39°
17°
15
41°
19°
16
45°
20°
17
46°
20°
18
44°
23°
19
46°
25°
20
44°
23°
21
41°
25°
22
41°
24°
23
43°
23°
24
42°
24°
25
44°
25°
26
43°
26°
27
43°
25°
28
44°
26°
29
44°
25°
30
38°
16°
31
44°
19°
1
46°
18°
2
Hist. Avg.
38°
18°
3
Hist. Avg.
39°
18°
4
Hist. Avg.
39°
18°
5
Hist. Avg.
39°
19°
6
Hist. Avg.
39°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Diamond
Diamond's January 2027 forecast shows daily high temperatures ranging from 35° to 46°, with overnight lows between 13° and 26°. The average high for January is 42° with an average low of 20°. 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 Diamond. See also: February | March | April.